AudioService: anonymize Bluetooth MAC addresses

Make sure APIs returning AudioDeviceAttributes from AudioService
anonymize the Bluetooth MAC addresses because those are considered
privacy sensitive.
Only expose the full MAC address to system and apps with BLUETOOTH_CONNECT
permission.

setters, getters and listeners for preferred device for strategy,
preferred device for capture preset and mute await connection are
modified:
- when entering AudioService, full MAC addresses are retrieved based on the
  known Bluetooth devices stored in AudioDeviceInventory.mDeviceInventory
- when exiting AudioService, MAC addresses are anonymized if the client
  app does not have BLUETOOTH_CONNECT permission or is not a system component

APIs based on AudioDeviceInfo do not need to be modified as the
AudioDeviceInfo MAC address is for the AudioPort cached in the app
process and AudioPorts are anonymized by the native audioserver before
being returned to client apps.

Bug: 285588444

Test: atest AudioManagerTest
Test: atest RoutingTest
Test: atest AudioCommunicationDeviceTest
Change-Id: I67bbba2ba941c97138a068d640079b17650e3d86
Merged-In: I67bbba2ba941c97138a068d640079b17650e3d86

5 files changed, 294 insertions, 60 deletions

diff --git a/media/java/android/media/AudioDeviceAttributes.java b/media/java/android/media/AudioDeviceAttributes.java
index af3c295b8d6c..5a274353f68e 100644
--- a/media/java/android/media/AudioDeviceAttributes.java
+++ b/media/java/android/media/AudioDeviceAttributes.java
@@ -68,7 +68,7 @@ public final class AudioDeviceAttributes implements Parcelable {
     /**
      * The unique address of the device. Some devices don't have addresses, only an empty string.
      */
-    private final @NonNull String mAddress;
+    private @NonNull String mAddress;
     /**
      * The non-unique name of the device. Some devices don't have names, only an empty string.
      * Should not be used as a unique identifier for a device.
@@ -188,6 +188,21 @@ public final class AudioDeviceAttributes implements Parcelable {
 
     /**
      * @hide
+     * Copy Constructor.
+     * @param ada the copied AudioDeviceAttributes
+     */
+    public AudioDeviceAttributes(AudioDeviceAttributes ada) {
+        mRole = ada.getRole();
+        mType = ada.getType();
+        mAddress = ada.getAddress();
+        mName = ada.getName();
+        mNativeType = ada.getInternalType();
+        mAudioProfiles = ada.getAudioProfiles();
+        mAudioDescriptors = ada.getAudioDescriptors();
+    }
+
+    /**
+     * @hide
      * Returns the role of a device
      * @return the role
      */
@@ -218,6 +233,15 @@ public final class AudioDeviceAttributes implements Parcelable {
 
     /**
      * @hide
+     * Sets the device address. Only used by audio service.
+     */
+    public void setAddress(@NonNull String address) {
+        Objects.requireNonNull(address);
+        mAddress = address;
+    }
+
+    /**
+     * @hide
      * Returns the name of the audio device, or an empty string for devices without one
      * @return the device name
      */
diff --git a/services/core/java/com/android/server/audio/AdiDeviceState.java b/services/core/java/com/android/server/audio/AdiDeviceState.java
index a27daf65b9f9..eab1eca90f6c 100644
--- a/services/core/java/com/android/server/audio/AdiDeviceState.java
+++ b/services/core/java/com/android/server/audio/AdiDeviceState.java
@@ -25,6 +25,7 @@ import android.media.AudioDeviceAttributes;
 import android.media.AudioDeviceInfo;
 import android.text.TextUtils;
 import android.util.Log;
+import android.util.Pair;
 
 import java.util.Objects;
 
@@ -43,6 +44,8 @@ import java.util.Objects;
     private final int mInternalDeviceType;
     @NonNull
     private final String mDeviceAddress;
+    /** Unique device id from internal device type and address. */
+    private final Pair<Integer, String> mDeviceId;
     private boolean mSAEnabled;
     private boolean mHasHeadTracker = false;
     private boolean mHeadTrackerEnabled;
@@ -68,6 +71,11 @@ import java.util.Objects;
         }
         mDeviceAddress = isBluetoothDevice(mInternalDeviceType) ? Objects.requireNonNull(
                 address) : "";
+        mDeviceId = new Pair<>(mInternalDeviceType, mDeviceAddress);
+    }
+
+    public Pair<Integer, String> getDeviceId() {
+        return mDeviceId;
     }
 
 
@@ -140,7 +148,8 @@ import java.util.Objects;
 
     @Override
     public String toString() {
-        return "type: " + mDeviceType + "internal type: " + mInternalDeviceType
+        return "type: " + mDeviceType
+                + " internal type: 0x" + Integer.toHexString(mInternalDeviceType)
                 + " addr: " + mDeviceAddress + " enabled: " + mSAEnabled
                 + " HT: " + mHasHeadTracker + " HTenabled: " + mHeadTrackerEnabled;
     }
diff --git a/services/core/java/com/android/server/audio/AudioDeviceBroker.java b/services/core/java/com/android/server/audio/AudioDeviceBroker.java
index 0682b7c47621..6ccdd827b45a 100644
--- a/services/core/java/com/android/server/audio/AudioDeviceBroker.java
+++ b/services/core/java/com/android/server/audio/AudioDeviceBroker.java
@@ -833,8 +833,8 @@ public class AudioDeviceBroker {
     }
 
     /*package*/ void registerStrategyPreferredDevicesDispatcher(
-            @NonNull IStrategyPreferredDevicesDispatcher dispatcher) {
-        mDeviceInventory.registerStrategyPreferredDevicesDispatcher(dispatcher);
+            @NonNull IStrategyPreferredDevicesDispatcher dispatcher, boolean isPrivileged) {
+        mDeviceInventory.registerStrategyPreferredDevicesDispatcher(dispatcher, isPrivileged);
     }
 
     /*package*/ void unregisterStrategyPreferredDevicesDispatcher(
@@ -852,8 +852,8 @@ public class AudioDeviceBroker {
     }
 
     /*package*/ void registerCapturePresetDevicesRoleDispatcher(
-            @NonNull ICapturePresetDevicesRoleDispatcher dispatcher) {
-        mDeviceInventory.registerCapturePresetDevicesRoleDispatcher(dispatcher);
+            @NonNull ICapturePresetDevicesRoleDispatcher dispatcher, boolean isPrivileged) {
+        mDeviceInventory.registerCapturePresetDevicesRoleDispatcher(dispatcher, isPrivileged);
     }
 
     /*package*/ void unregisterCapturePresetDevicesRoleDispatcher(
@@ -861,6 +861,11 @@ public class AudioDeviceBroker {
         mDeviceInventory.unregisterCapturePresetDevicesRoleDispatcher(dispatcher);
     }
 
+    /* package */ List<AudioDeviceAttributes> anonymizeAudioDeviceAttributesListUnchecked(
+            List<AudioDeviceAttributes> devices) {
+        return mAudioService.anonymizeAudioDeviceAttributesListUnchecked(devices);
+    }
+
     /*package*/ void registerCommunicationDeviceDispatcher(
             @NonNull ICommunicationDeviceDispatcher dispatcher) {
         mCommDevDispatchers.register(dispatcher);
diff --git a/services/core/java/com/android/server/audio/AudioDeviceInventory.java b/services/core/java/com/android/server/audio/AudioDeviceInventory.java
index 25a48f21468e..9524c54acc36 100644
--- a/services/core/java/com/android/server/audio/AudioDeviceInventory.java
+++ b/services/core/java/com/android/server/audio/AudioDeviceInventory.java
@@ -40,6 +40,7 @@ import android.text.TextUtils;
 import android.util.ArrayMap;
 import android.util.ArraySet;
 import android.util.Log;
+import android.util.Pair;
 import android.util.Slog;
 
 import com.android.internal.annotations.GuardedBy;
@@ -47,7 +48,9 @@ import com.android.internal.annotations.VisibleForTesting;
 
 import java.io.PrintWriter;
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Objects;
@@ -74,31 +77,58 @@ public class AudioDeviceInventory {
 
     private final Object mDeviceInventoryLock = new Object();
     @GuardedBy("mDeviceInventoryLock")
-    private final ArrayList<AdiDeviceState> mDeviceInventory = new ArrayList<>(0);
-
+    private final HashMap<Pair<Integer, String>, AdiDeviceState> mDeviceInventory = new HashMap<>();
 
     List<AdiDeviceState> getImmutableDeviceInventory() {
         synchronized (mDeviceInventoryLock) {
-            return List.copyOf(mDeviceInventory);
+            return new ArrayList<AdiDeviceState>(mDeviceInventory.values());
         }
     }
 
     void addDeviceStateToInventory(AdiDeviceState deviceState) {
         synchronized (mDeviceInventoryLock) {
-            mDeviceInventory.add(deviceState);
+            mDeviceInventory.put(deviceState.getDeviceId(), deviceState);
+        }
+    }
+
+    /**
+     * Adds a new entry in mDeviceInventory if the AudioDeviceAttributes passed is an sink
+     * Bluetooth device and no corresponding entry already exists.
+     * @param ada the device to add if needed
+     */
+    void addAudioDeviceInInventoryIfNeeded(AudioDeviceAttributes ada) {
+        if (!AudioSystem.isBluetoothOutDevice(ada.getInternalType())) {
+            return;
+        }
+        synchronized (mDeviceInventoryLock) {
+            if (findDeviceStateForAudioDeviceAttributes(ada, ada.getType()) != null) {
+                return;
+            }
+            AdiDeviceState ads = new AdiDeviceState(
+                    ada.getType(), ada.getInternalType(), ada.getAddress());
+            mDeviceInventory.put(ads.getDeviceId(), ads);
         }
+        mDeviceBroker.persistAudioDeviceSettings();
     }
 
+    /**
+     * Finds the device state that matches the passed {@link AudioDeviceAttributes} and device
+     * type. Note: currently this method only returns a valid device for A2DP and BLE devices.
+     *
+     * @param ada attributes of device to match
+     * @param canonicalDeviceType external device type to match
+     * @return the found {@link AdiDeviceState} matching a cached A2DP or BLE device or
+     *         {@code null} otherwise.
+     */
     AdiDeviceState findDeviceStateForAudioDeviceAttributes(AudioDeviceAttributes ada,
             int canonicalDeviceType) {
         final boolean isWireless = isBluetoothDevice(ada.getInternalType());
-
         synchronized (mDeviceInventoryLock) {
-            for (AdiDeviceState deviceSetting : mDeviceInventory) {
-                if (deviceSetting.getDeviceType() == canonicalDeviceType
+            for (AdiDeviceState deviceState : mDeviceInventory.values()) {
+                if (deviceState.getDeviceType() == canonicalDeviceType
                         && (!isWireless || ada.getAddress().equals(
-                        deviceSetting.getDeviceAddress()))) {
-                    return deviceSetting;
+                        deviceState.getDeviceAddress()))) {
+                    return deviceState;
                 }
             }
         }
@@ -308,7 +338,7 @@ public class AudioDeviceInventory {
                     + " devices:" + devices); });
         pw.println("\ndevices:\n");
         synchronized (mDeviceInventoryLock) {
-            for (AdiDeviceState device : mDeviceInventory) {
+            for (AdiDeviceState device : mDeviceInventory.values()) {
                 pw.println("\t" + device + "\n");
             }
         }
@@ -695,8 +725,8 @@ public class AudioDeviceInventory {
     }
 
     /*package*/ void registerStrategyPreferredDevicesDispatcher(
-            @NonNull IStrategyPreferredDevicesDispatcher dispatcher) {
-        mPrefDevDispatchers.register(dispatcher);
+            @NonNull IStrategyPreferredDevicesDispatcher dispatcher, boolean isPrivileged) {
+        mPrefDevDispatchers.register(dispatcher, isPrivileged);
     }
 
     /*package*/ void unregisterStrategyPreferredDevicesDispatcher(
@@ -730,8 +760,8 @@ public class AudioDeviceInventory {
     }
 
     /*package*/ void registerCapturePresetDevicesRoleDispatcher(
-            @NonNull ICapturePresetDevicesRoleDispatcher dispatcher) {
-        mDevRoleCapturePresetDispatchers.register(dispatcher);
+            @NonNull ICapturePresetDevicesRoleDispatcher dispatcher, boolean isPrivileged) {
+        mDevRoleCapturePresetDispatchers.register(dispatcher, isPrivileged);
     }
 
     /*package*/ void unregisterCapturePresetDevicesRoleDispatcher(
@@ -809,6 +839,9 @@ public class AudioDeviceInventory {
                 mConnectedDevices.put(deviceKey, new DeviceInfo(
                         device, deviceName, address, AudioSystem.AUDIO_FORMAT_DEFAULT));
                 mDeviceBroker.postAccessoryPlugMediaUnmute(device);
+                if (AudioSystem.isBluetoothScoDevice(device)) {
+                    addAudioDeviceInInventoryIfNeeded(attributes);
+                }
                 mmi.set(MediaMetrics.Property.STATE, MediaMetrics.Value.CONNECTED).record();
                 return true;
             } else if (!connect && isConnected) {
@@ -1038,8 +1071,9 @@ public class AudioDeviceInventory {
         mDeviceBroker.setBluetoothA2dpOnInt(true, true /*fromA2dp*/, eventSource);
         // at this point there could be another A2DP device already connected in APM, but it
         // doesn't matter as this new one will overwrite the previous one
-        final int res = mAudioSystem.setDeviceConnectionState(new AudioDeviceAttributes(
-                AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP, address, name),
+        AudioDeviceAttributes ada = new AudioDeviceAttributes(
+                AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP, address, name);
+        final int res = mAudioSystem.setDeviceConnectionState(ada,
                 AudioSystem.DEVICE_STATE_AVAILABLE, a2dpCodec);
 
         // TODO: log in MediaMetrics once distinction between connection failure and
@@ -1061,8 +1095,7 @@ public class AudioDeviceInventory {
         // The convention for head tracking sensors associated with A2DP devices is to
         // use a UUID derived from the MAC address as follows:
         //   time_low = 0, time_mid = 0, time_hi = 0, clock_seq = 0, node = MAC Address
-        UUID sensorUuid = UuidUtils.uuidFromAudioDeviceAttributes(
-                new AudioDeviceAttributes(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP, address));
+        UUID sensorUuid = UuidUtils.uuidFromAudioDeviceAttributes(ada);
         final DeviceInfo di = new DeviceInfo(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP, name,
                 address, a2dpCodec, sensorUuid);
         final String diKey = di.getKey();
@@ -1073,8 +1106,10 @@ public class AudioDeviceInventory {
 
         mDeviceBroker.postAccessoryPlugMediaUnmute(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP);
         setCurrentAudioRouteNameIfPossible(name, true /*fromA2dp*/);
+        addAudioDeviceInInventoryIfNeeded(ada);
     }
 
+
     @GuardedBy("mDevicesLock")
     private void makeA2dpDeviceUnavailableNow(String address, int a2dpCodec) {
         MediaMetrics.Item mmi = new MediaMetrics.Item(mMetricsId + "a2dp." + address)
@@ -1168,9 +1203,9 @@ public class AudioDeviceInventory {
         final int hearingAidVolIndex = mDeviceBroker.getVssVolumeForDevice(streamType,
                 AudioSystem.DEVICE_OUT_HEARING_AID);
         mDeviceBroker.postSetHearingAidVolumeIndex(hearingAidVolIndex, streamType);
-
-        mAudioSystem.setDeviceConnectionState(new AudioDeviceAttributes(
-                AudioSystem.DEVICE_OUT_HEARING_AID, address, name),
+        AudioDeviceAttributes ada = new AudioDeviceAttributes(
+                AudioSystem.DEVICE_OUT_HEARING_AID, address, name);
+        mAudioSystem.setDeviceConnectionState(ada,
                 AudioSystem.DEVICE_STATE_AVAILABLE,
                 AudioSystem.AUDIO_FORMAT_DEFAULT);
         mConnectedDevices.put(
@@ -1181,6 +1216,7 @@ public class AudioDeviceInventory {
         mDeviceBroker.postApplyVolumeOnDevice(streamType,
                 AudioSystem.DEVICE_OUT_HEARING_AID, "makeHearingAidDeviceAvailable");
         setCurrentAudioRouteNameIfPossible(name, false /*fromA2dp*/);
+        addAudioDeviceInInventoryIfNeeded(ada);
         new MediaMetrics.Item(mMetricsId + "makeHearingAidDeviceAvailable")
                 .set(MediaMetrics.Property.ADDRESS, address != null ? address : "")
                 .set(MediaMetrics.Property.DEVICE,
@@ -1217,13 +1253,15 @@ public class AudioDeviceInventory {
              */
             mDeviceBroker.setBluetoothA2dpOnInt(true, false /*fromA2dp*/, eventSource);
 
-            AudioSystem.setDeviceConnectionState(new AudioDeviceAttributes(device, address, name),
+            AudioDeviceAttributes ada = new AudioDeviceAttributes(device, address, name);
+            AudioSystem.setDeviceConnectionState(ada,
                     AudioSystem.DEVICE_STATE_AVAILABLE,
                     AudioSystem.AUDIO_FORMAT_DEFAULT);
             mConnectedDevices.put(DeviceInfo.makeDeviceListKey(device, address),
                     new DeviceInfo(device, name, address, AudioSystem.AUDIO_FORMAT_DEFAULT));
             mDeviceBroker.postAccessoryPlugMediaUnmute(device);
             setCurrentAudioRouteNameIfPossible(name, /*fromA2dp=*/false);
+            addAudioDeviceInInventoryIfNeeded(ada);
         }
 
         if (streamType == AudioSystem.STREAM_DEFAULT) {
@@ -1524,6 +1562,9 @@ public class AudioDeviceInventory {
         final int nbDispatchers = mPrefDevDispatchers.beginBroadcast();
         for (int i = 0; i < nbDispatchers; i++) {
             try {
+                if (!((Boolean) mPrefDevDispatchers.getBroadcastCookie(i))) {
+                    devices = mDeviceBroker.anonymizeAudioDeviceAttributesListUnchecked(devices);
+                }
                 mPrefDevDispatchers.getBroadcastItem(i).dispatchPrefDevicesChanged(
                         strategy, devices);
             } catch (RemoteException e) {
@@ -1537,6 +1578,9 @@ public class AudioDeviceInventory {
         final int nbDispatchers = mDevRoleCapturePresetDispatchers.beginBroadcast();
         for (int i = 0; i < nbDispatchers; ++i) {
             try {
+                if (!((Boolean) mDevRoleCapturePresetDispatchers.getBroadcastCookie(i))) {
+                    devices = mDeviceBroker.anonymizeAudioDeviceAttributesListUnchecked(devices);
+                }
                 mDevRoleCapturePresetDispatchers.getBroadcastItem(i).dispatchDevicesRoleChanged(
                         capturePreset, role, devices);
             } catch (RemoteException e) {
@@ -1561,19 +1605,20 @@ public class AudioDeviceInventory {
         int deviceCatalogSize = 0;
         synchronized (mDeviceInventoryLock) {
             deviceCatalogSize = mDeviceInventory.size();
-        }
-        final StringBuilder settingsBuilder = new StringBuilder(
+
+            final StringBuilder settingsBuilder = new StringBuilder(
                 deviceCatalogSize * AdiDeviceState.getPeristedMaxSize());
 
-        synchronized (mDeviceInventoryLock) {
-            for (int i = 0; i < mDeviceInventory.size(); i++) {
-                settingsBuilder.append(mDeviceInventory.get(i).toPersistableString());
-                if (i != mDeviceInventory.size() - 1) {
-                    settingsBuilder.append(SETTING_DEVICE_SEPARATOR_CHAR);
-                }
+            Iterator<AdiDeviceState> iterator = mDeviceInventory.values().iterator();
+            if (iterator.hasNext()) {
+                settingsBuilder.append(iterator.next().toPersistableString());
+            }
+            while (iterator.hasNext()) {
+                settingsBuilder.append(SETTING_DEVICE_SEPARATOR_CHAR);
+                settingsBuilder.append(iterator.next().toPersistableString());
             }
+            return settingsBuilder.toString();
         }
-        return settingsBuilder.toString();
     }
 
     /*package*/ void setDeviceSettings(String settings) {
diff --git a/services/core/java/com/android/server/audio/AudioService.java b/services/core/java/com/android/server/audio/AudioService.java
index d01f694c6abc..58b07e385ecf 100644
--- a/services/core/java/com/android/server/audio/AudioService.java
+++ b/services/core/java/com/android/server/audio/AudioService.java
@@ -2638,8 +2638,11 @@ public class AudioService extends IAudioService.Stub
             return AudioSystem.ERROR;
         }
         enforceModifyAudioRoutingPermission();
+
+        devices = retrieveBluetoothAddresses(devices);
+
         final String logString = String.format(
-                "setPreferredDeviceForStrategy u/pid:%d/%d strat:%d dev:%s",
+                "setPreferredDevicesForStrategy u/pid:%d/%d strat:%d dev:%s",
                 Binder.getCallingUid(), Binder.getCallingPid(), strategy,
                 devices.stream().map(e -> e.toString()).collect(Collectors.joining(",")));
         sDeviceLogger.log(new AudioEventLogger.StringEvent(logString).printLog(TAG));
@@ -2687,7 +2690,7 @@ public class AudioService extends IAudioService.Stub
                     status, strategy));
             return new ArrayList<AudioDeviceAttributes>();
         } else {
-            return devices;
+            return anonymizeAudioDeviceAttributesList(devices);
         }
     }
 
@@ -2700,7 +2703,8 @@ public class AudioService extends IAudioService.Stub
             return;
         }
         enforceModifyAudioRoutingPermission();
-        mDeviceBroker.registerStrategyPreferredDevicesDispatcher(dispatcher);
+        mDeviceBroker.registerStrategyPreferredDevicesDispatcher(
+                dispatcher, isBluetoothPrividged());
     }
 
     /** @see AudioManager#removeOnPreferredDevicesForStrategyChangedListener(
@@ -2716,7 +2720,7 @@ public class AudioService extends IAudioService.Stub
     }
 
     /**
-     * @see AudioManager#setPreferredDeviceForCapturePreset(int, AudioDeviceAttributes)
+     * @see AudioManager#setPreferredDevicesForCapturePreset(int, AudioDeviceAttributes)
      */
     public int setPreferredDevicesForCapturePreset(
             int capturePreset, List<AudioDeviceAttributes> devices) {
@@ -2735,6 +2739,8 @@ public class AudioService extends IAudioService.Stub
             return AudioSystem.ERROR;
         }
 
+        devices = retrieveBluetoothAddresses(devices);
+
         final int status = mDeviceBroker.setPreferredDevicesForCapturePresetSync(
                 capturePreset, devices);
         if (status != AudioSystem.SUCCESS) {
@@ -2773,7 +2779,7 @@ public class AudioService extends IAudioService.Stub
                     status, capturePreset));
             return new ArrayList<AudioDeviceAttributes>();
         } else {
-            return devices;
+            return anonymizeAudioDeviceAttributesList(devices);
         }
     }
 
@@ -2787,7 +2793,8 @@ public class AudioService extends IAudioService.Stub
             return;
         }
         enforceModifyAudioRoutingPermission();
-        mDeviceBroker.registerCapturePresetDevicesRoleDispatcher(dispatcher);
+        mDeviceBroker.registerCapturePresetDevicesRoleDispatcher(
+                dispatcher, isBluetoothPrividged());
     }
 
     /**
@@ -2807,7 +2814,9 @@ public class AudioService extends IAudioService.Stub
     public @NonNull ArrayList<AudioDeviceAttributes> getDevicesForAttributes(
             @NonNull AudioAttributes attributes) {
         enforceQueryStateOrModifyRoutingPermission();
-        return getDevicesForAttributesInt(attributes, false /* forVolume */);
+
+        return new ArrayList<AudioDeviceAttributes>(anonymizeAudioDeviceAttributesList(
+                getDevicesForAttributesInt(attributes, false /* forVolume */)));
     }
 
     /** @see AudioManager#getAudioDevicesForAttributes(AudioAttributes)
@@ -2817,7 +2826,8 @@ public class AudioService extends IAudioService.Stub
      */
     public @NonNull ArrayList<AudioDeviceAttributes> getDevicesForAttributesUnprotected(
             @NonNull AudioAttributes attributes) {
-        return getDevicesForAttributesInt(attributes, false /* forVolume */);
+        return new ArrayList<AudioDeviceAttributes>(anonymizeAudioDeviceAttributesList(
+                getDevicesForAttributesInt(attributes, false /* forVolume */)));
     }
 
     /**
@@ -6639,6 +6649,9 @@ public class AudioService extends IAudioService.Stub
         // verify arguments
         Objects.requireNonNull(device);
         AudioManager.enforceValidVolumeBehavior(deviceVolumeBehavior);
+
+        device = retrieveBluetoothAddress(device);
+
         sVolumeLogger.log(new AudioEventLogger.StringEvent("setDeviceVolumeBehavior: dev:"
                 + AudioSystem.getOutputDeviceName(device.getInternalType()) + " addr:"
                 + device.getAddress() + " behavior:"
@@ -6715,6 +6728,8 @@ public class AudioService extends IAudioService.Stub
         // verify permissions
         enforceQueryStateOrModifyRoutingPermission();
 
+        device = retrieveBluetoothAddress(device);
+
         return getDeviceVolumeBehaviorInt(device);
     }
 
@@ -6791,6 +6806,9 @@ public class AudioService extends IAudioService.Stub
     public void setWiredDeviceConnectionState(AudioDeviceAttributes attributes,
             @ConnectionState int state, String caller) {
         enforceModifyAudioRoutingPermission();
+
+        attributes = retrieveBluetoothAddress(attributes);
+
         if (state != CONNECTION_STATE_CONNECTED
                 && state != CONNECTION_STATE_DISCONNECTED) {
             throw new IllegalArgumentException("Invalid state " + state);
@@ -6812,6 +6830,9 @@ public class AudioService extends IAudioService.Stub
             boolean connected) {
         Objects.requireNonNull(device);
         enforceModifyAudioRoutingPermission();
+
+        device = retrieveBluetoothAddress(device);
+
         mDeviceBroker.setTestDeviceConnectionState(device,
                 connected ? CONNECTION_STATE_CONNECTED : CONNECTION_STATE_DISCONNECTED);
         // simulate a routing update from native
@@ -9107,6 +9128,100 @@ public class AudioService extends IAudioService.Stub
         mSpatializerHelper.setFeatureEnabled(mHasSpatializerEffect);
     }
 
+    private boolean isBluetoothPrividged() {
+        return PackageManager.PERMISSION_GRANTED == mContext.checkCallingOrSelfPermission(
+                android.Manifest.permission.BLUETOOTH_CONNECT)
+                || Binder.getCallingUid() == Process.SYSTEM_UID;
+    }
+
+    List<AudioDeviceAttributes> retrieveBluetoothAddresses(List<AudioDeviceAttributes> devices) {
+        if (isBluetoothPrividged()) {
+            return devices;
+        }
+
+        List<AudioDeviceAttributes> checkedDevices = new ArrayList<AudioDeviceAttributes>();
+        for (AudioDeviceAttributes ada : devices) {
+            if (ada == null) {
+                continue;
+            }
+            checkedDevices.add(retrieveBluetoothAddressUncheked(ada));
+        }
+        return checkedDevices;
+    }
+
+    AudioDeviceAttributes retrieveBluetoothAddress(@NonNull AudioDeviceAttributes ada) {
+        if (isBluetoothPrividged()) {
+            return ada;
+        }
+        return retrieveBluetoothAddressUncheked(ada);
+    }
+
+    AudioDeviceAttributes retrieveBluetoothAddressUncheked(@NonNull AudioDeviceAttributes ada) {
+        Objects.requireNonNull(ada);
+        if (AudioSystem.isBluetoothDevice(ada.getInternalType())) {
+            String anonymizedAddress = anonymizeBluetoothAddress(ada.getAddress());
+            for (AdiDeviceState ads : mDeviceBroker.getImmutableDeviceInventory()) {
+                if (!(AudioSystem.isBluetoothDevice(ads.getInternalDeviceType())
+                        && (ada.getInternalType() == ads.getInternalDeviceType())
+                        && anonymizedAddress.equals(anonymizeBluetoothAddress(
+                                ads.getDeviceAddress())))) {
+                    continue;
+                }
+                ada.setAddress(ads.getDeviceAddress());
+                break;
+            }
+        }
+        return ada;
+    }
+
+    /**
+     * Convert a Bluetooth MAC address to an anonymized one when exposed to a non privileged app
+     * Must match the implementation of BluetoothUtils.toAnonymizedAddress()
+     * @param address Mac address to be anonymized
+     * @return anonymized mac address
+     */
+    static String anonymizeBluetoothAddress(String address) {
+        if (address == null || address.length() != "AA:BB:CC:DD:EE:FF".length()) {
+            return null;
+        }
+        return "XX:XX:XX:XX" + address.substring("XX:XX:XX:XX".length());
+    }
+
+    private List<AudioDeviceAttributes> anonymizeAudioDeviceAttributesList(
+                List<AudioDeviceAttributes> devices) {
+        if (isBluetoothPrividged()) {
+            return devices;
+        }
+        return anonymizeAudioDeviceAttributesListUnchecked(devices);
+    }
+
+    /* package */ List<AudioDeviceAttributes> anonymizeAudioDeviceAttributesListUnchecked(
+            List<AudioDeviceAttributes> devices) {
+        List<AudioDeviceAttributes> anonymizedDevices = new ArrayList<AudioDeviceAttributes>();
+        for (AudioDeviceAttributes ada : devices) {
+            anonymizedDevices.add(anonymizeAudioDeviceAttributesUnchecked(ada));
+        }
+        return anonymizedDevices;
+    }
+
+    private AudioDeviceAttributes anonymizeAudioDeviceAttributesUnchecked(
+            AudioDeviceAttributes ada) {
+        if (!AudioSystem.isBluetoothDevice(ada.getInternalType())) {
+            return ada;
+        }
+        AudioDeviceAttributes res = new AudioDeviceAttributes(ada);
+        res.setAddress(anonymizeBluetoothAddress(ada.getAddress()));
+        return res;
+    }
+
+    private AudioDeviceAttributes anonymizeAudioDeviceAttributes(AudioDeviceAttributes ada) {
+        if (isBluetoothPrividged()) {
+            return ada;
+        }
+
+        return anonymizeAudioDeviceAttributesUnchecked(ada);
+    }
+
     //==========================================================================================
     private boolean readCameraSoundForced() {
         return SystemProperties.getBoolean("audio.camerasound.force", false) ||
@@ -9134,13 +9249,16 @@ public class AudioService extends IAudioService.Stub
         Objects.requireNonNull(usages);
         Objects.requireNonNull(device);
         enforceModifyAudioRoutingPermission();
+
+        final AudioDeviceAttributes ada = retrieveBluetoothAddress(device);
+
         if (timeOutMs <= 0 || usages.length == 0) {
             throw new IllegalArgumentException("Invalid timeOutMs/usagesToMute");
         }
         Log.i(TAG, "muteAwaitConnection dev:" + device + " timeOutMs:" + timeOutMs
                 + " usages:" + Arrays.toString(usages));
 
-        if (mDeviceBroker.isDeviceConnected(device)) {
+        if (mDeviceBroker.isDeviceConnected(ada)) {
             // not throwing an exception as there could be a race between a connection (server-side,
             // notification of connection in flight) and a mute operation (client-side)
             Log.i(TAG, "muteAwaitConnection ignored, device (" + device + ") already connected");
@@ -9152,19 +9270,26 @@ public class AudioService extends IAudioService.Stub
                         + mMutingExpectedDevice);
                 throw new IllegalStateException("muteAwaitConnection already in progress");
             }
-            mMutingExpectedDevice = device;
+            mMutingExpectedDevice = ada;
             mMutedUsagesAwaitingConnection = usages;
-            mPlaybackMonitor.muteAwaitConnection(usages, device, timeOutMs);
+            mPlaybackMonitor.muteAwaitConnection(usages, ada, timeOutMs);
         }
-        dispatchMuteAwaitConnection(cb -> { try {
-            cb.dispatchOnMutedUntilConnection(device, usages); } catch (RemoteException e) { } });
+        dispatchMuteAwaitConnection((cb, isPrivileged) -> {
+            try {
+                AudioDeviceAttributes dev = ada;
+                if (!isPrivileged) {
+                    dev = anonymizeAudioDeviceAttributesUnchecked(ada);
+                }
+                cb.dispatchOnMutedUntilConnection(dev, usages);
+            } catch (RemoteException e) { }
+        });
     }
 
     /** @see AudioManager#getMutingExpectedDevice */
     public @Nullable AudioDeviceAttributes getMutingExpectedDevice() {
         enforceModifyAudioRoutingPermission();
         synchronized (mMuteAwaitConnectionLock) {
-            return mMutingExpectedDevice;
+            return anonymizeAudioDeviceAttributes(mMutingExpectedDevice);
         }
     }
 
@@ -9173,6 +9298,9 @@ public class AudioService extends IAudioService.Stub
     public void cancelMuteAwaitConnection(@NonNull AudioDeviceAttributes device) {
         Objects.requireNonNull(device);
         enforceModifyAudioRoutingPermission();
+
+        final AudioDeviceAttributes ada = retrieveBluetoothAddress(device);
+
         Log.i(TAG, "cancelMuteAwaitConnection for device:" + device);
         final int[] mutedUsages;
         synchronized (mMuteAwaitConnectionLock) {
@@ -9182,7 +9310,7 @@ public class AudioService extends IAudioService.Stub
                 Log.i(TAG, "cancelMuteAwaitConnection ignored, no expected device");
                 return;
             }
-            if (!device.equalTypeAddress(mMutingExpectedDevice)) {
+            if (!ada.equalTypeAddress(mMutingExpectedDevice)) {
                 Log.e(TAG, "cancelMuteAwaitConnection ignored, got " + device
                         + "] but expected device is" + mMutingExpectedDevice);
                 throw new IllegalStateException("cancelMuteAwaitConnection for wrong device");
@@ -9192,8 +9320,14 @@ public class AudioService extends IAudioService.Stub
             mMutedUsagesAwaitingConnection = null;
             mPlaybackMonitor.cancelMuteAwaitConnection("cancelMuteAwaitConnection dev:" + device);
         }
-        dispatchMuteAwaitConnection(cb -> { try { cb.dispatchOnUnmutedEvent(
-                    AudioManager.MuteAwaitConnectionCallback.EVENT_CANCEL, device, mutedUsages);
+        dispatchMuteAwaitConnection((cb, isPrivileged) -> {
+            try {
+                AudioDeviceAttributes dev = ada;
+                if (!isPrivileged) {
+                    dev = anonymizeAudioDeviceAttributesUnchecked(ada);
+                }
+                cb.dispatchOnUnmutedEvent(
+                        AudioManager.MuteAwaitConnectionCallback.EVENT_CANCEL, dev, mutedUsages);
             } catch (RemoteException e) { } });
     }
 
@@ -9205,7 +9339,7 @@ public class AudioService extends IAudioService.Stub
             boolean register) {
         enforceModifyAudioRoutingPermission();
         if (register) {
-            mMuteAwaitConnectionDispatchers.register(cb);
+            mMuteAwaitConnectionDispatchers.register(cb, isBluetoothPrividged());
         } else {
             mMuteAwaitConnectionDispatchers.unregister(cb);
         }
@@ -9229,8 +9363,14 @@ public class AudioService extends IAudioService.Stub
             mPlaybackMonitor.cancelMuteAwaitConnection(
                     "checkMuteAwaitConnection device " + device + " connected, unmuting");
         }
-        dispatchMuteAwaitConnection(cb -> { try { cb.dispatchOnUnmutedEvent(
-                AudioManager.MuteAwaitConnectionCallback.EVENT_CONNECTION, device, mutedUsages);
+        dispatchMuteAwaitConnection((cb, isPrivileged) -> {
+            try {
+                AudioDeviceAttributes ada = device;
+                if (!isPrivileged) {
+                    ada = anonymizeAudioDeviceAttributesUnchecked(device);
+                }
+                cb.dispatchOnUnmutedEvent(AudioManager.MuteAwaitConnectionCallback.EVENT_CONNECTION,
+                        ada, mutedUsages);
             } catch (RemoteException e) { } });
     }
 
@@ -9250,7 +9390,8 @@ public class AudioService extends IAudioService.Stub
             mMutingExpectedDevice = null;
             mMutedUsagesAwaitingConnection = null;
         }
-        dispatchMuteAwaitConnection(cb -> { try {
+        dispatchMuteAwaitConnection((cb, isPrivileged) -> {
+            try {
                 cb.dispatchOnUnmutedEvent(
                         AudioManager.MuteAwaitConnectionCallback.EVENT_TIMEOUT,
                         timedOutDevice, mutedUsages);
@@ -9258,13 +9399,14 @@ public class AudioService extends IAudioService.Stub
     }
 
     private void dispatchMuteAwaitConnection(
-            java.util.function.Consumer<IMuteAwaitConnectionCallback> callback) {
+            java.util.function.BiConsumer<IMuteAwaitConnectionCallback, Boolean> callback) {
         final int nbDispatchers = mMuteAwaitConnectionDispatchers.beginBroadcast();
         // lazy initialization as errors unlikely
         ArrayList<IMuteAwaitConnectionCallback> errorList = null;
         for (int i = 0; i < nbDispatchers; i++) {
             try {
-                callback.accept(mMuteAwaitConnectionDispatchers.getBroadcastItem(i));
+                callback.accept(mMuteAwaitConnectionDispatchers.getBroadcastItem(i),
+                        (Boolean) mMuteAwaitConnectionDispatchers.getBroadcastCookie(i));
             } catch (Exception e) {
                 if (errorList == null) {
                     errorList = new ArrayList<>(1);
@@ -11517,6 +11659,9 @@ public class AudioService extends IAudioService.Stub
             @NonNull AudioDeviceAttributes device, @IntRange(from = 0) long delayMillis) {
         Objects.requireNonNull(device, "device must not be null");
         enforceModifyAudioRoutingPermission();
+
+        device = retrieveBluetoothAddress(device);
+
         final String getterKey = "additional_output_device_delay="
                 + device.getInternalType() + "," + device.getAddress(); // "getter" key as an id.
         final String setterKey = getterKey + "," + delayMillis;     // append the delay for setter
@@ -11537,6 +11682,9 @@ public class AudioService extends IAudioService.Stub
     @IntRange(from = 0)
     public long getAdditionalOutputDeviceDelay(@NonNull AudioDeviceAttributes device) {
         Objects.requireNonNull(device, "device must not be null");
+
+        device = retrieveBluetoothAddress(device);
+
         final String key = "additional_output_device_delay";
         final String reply = AudioSystem.getParameters(
                 key + "=" + device.getInternalType() + "," + device.getAddress());
@@ -11564,6 +11712,9 @@ public class AudioService extends IAudioService.Stub
     @IntRange(from = 0)
     public long getMaxAdditionalOutputDeviceDelay(@NonNull AudioDeviceAttributes device) {
         Objects.requireNonNull(device, "device must not be null");
+
+        device = retrieveBluetoothAddress(device);
+
         final String key = "max_additional_output_device_delay";
         final String reply = AudioSystem.getParameters(
                 key + "=" + device.getInternalType() + "," + device.getAddress());