MediaRouter: Create BluetoothRouteProvider for each user

The bluetooth service manages the active device for each user
and sent broadcast for each user.

BluetoothRouteProvider was singleton and listened broadcast
from the owner (uid=0) only , which failed to catch correct events when
the foreground user is not the owner.

This CL fixes that by creating BluetoothRouteProvider per user and
listening to the events of each user.

Bug: 162541640
Test: manually open the output switcher and check bluetooth state with switching users
and run cts

Change-Id: Iabab6f7830ce0224b7f73a7c5cfb863aebf5562b
(cherry picked from commit 715b6488ae)

services/core/java/com/android/server/media/BluetoothRouteProvider.java

@@ -34,6 +34,7 @@ import android.content.IntentFilter;
 import android.media.AudioManager;
 import android.media.AudioSystem;
 import android.media.MediaRoute2Info;
+import android.os.UserHandle;
 import android.text.TextUtils;
 import android.util.Log;
 import android.util.Slog;
@@ -55,7 +56,6 @@ class BluetoothRouteProvider {
     private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
 
     private static final String HEARING_AID_ROUTE_ID_PREFIX = "HEARING_AID_";
-    private static BluetoothRouteProvider sInstance;
 
     @SuppressWarnings("WeakerAccess") /* synthetic access */
     // Maps hardware address to BluetoothRouteInfo
@@ -79,19 +79,21 @@ class BluetoothRouteProvider {
     private final BroadcastReceiver mBroadcastReceiver = new BluetoothBroadcastReceiver();
     private final BluetoothProfileListener mProfileListener = new BluetoothProfileListener();
 
-    static synchronized BluetoothRouteProvider getInstance(@NonNull Context context,
+    /**
+     * Create an instance of {@link BluetoothRouteProvider}.
+     * It may return {@code null} if Bluetooth is not supported on this hardware platform.
+     */
+    @Nullable
+    static BluetoothRouteProvider createInstance(@NonNull Context context,
             @NonNull BluetoothRoutesUpdatedListener listener) {
         Objects.requireNonNull(context);
         Objects.requireNonNull(listener);
 
-        if (sInstance == null) {
-            BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter();
-            if (btAdapter == null) {
-                return null;
-            }
-            sInstance = new BluetoothRouteProvider(context, btAdapter, listener);
+        BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter();
+        if (btAdapter == null) {
+            return null;
         }
-        return sInstance;
+        return new BluetoothRouteProvider(context, btAdapter, listener);
     }
 
     private BluetoothRouteProvider(Context context, BluetoothAdapter btAdapter,
@@ -103,7 +105,7 @@ class BluetoothRouteProvider {
         buildBluetoothRoutes();
     }
 
-    public void start() {
+    public void start(UserHandle user) {
         mBluetoothAdapter.getProfileProxy(mContext, mProfileListener, BluetoothProfile.A2DP);
         mBluetoothAdapter.getProfileProxy(mContext, mProfileListener, BluetoothProfile.HEARING_AID);
 
@@ -118,7 +120,8 @@ class BluetoothRouteProvider {
         addEventReceiver(BluetoothHearingAid.ACTION_CONNECTION_STATE_CHANGED,
                 deviceStateChangedReceiver);
 
-        mContext.registerReceiver(mBroadcastReceiver, mIntentFilter, null, null);
+        mContext.registerReceiverAsUser(mBroadcastReceiver, user,
+                mIntentFilter, null, null);
     }
 
     /**

services/core/java/com/android/server/media/MediaRouter2ServiceImpl.java

@@ -1176,7 +1176,8 @@ class MediaRouter2ServiceImpl {
             super(Looper.getMainLooper(), null, true);
             mServiceRef = new WeakReference<>(service);
             mUserRecord = userRecord;
-            mSystemProvider = new SystemMediaRoute2Provider(service.mContext);
+            mSystemProvider = new SystemMediaRoute2Provider(service.mContext,
+                    UserHandle.of(userRecord.mUserId));
             mRouteProviders.add(mSystemProvider);
             mWatcher = new MediaRoute2ProviderWatcher(service.mContext, this,
                     this, mUserRecord.mUserId);

services/core/java/com/android/server/media/SystemMediaRoute2Provider.java

@@ -45,6 +45,7 @@ import android.os.Handler;
 import android.os.Looper;
 import android.os.RemoteException;
 import android.os.ServiceManager;
+import android.os.UserHandle;
 import android.text.TextUtils;
 import android.util.Log;
 import android.util.Slog;
@@ -99,7 +100,7 @@ class SystemMediaRoute2Provider extends MediaRoute2Provider {
         }
     };
 
-    SystemMediaRoute2Provider(Context context) {
+    SystemMediaRoute2Provider(Context context, UserHandle user) {
         super(sComponentName);
 
         mIsSystemRouteProvider = true;
@@ -117,7 +118,7 @@ class SystemMediaRoute2Provider extends MediaRoute2Provider {
         updateDeviceRoute(newAudioRoutes);
 
         // .getInstance returns null if there is no bt adapter available
-        mBtRouteProvider = BluetoothRouteProvider.getInstance(context, (routes) -> {
+        mBtRouteProvider = BluetoothRouteProvider.createInstance(context, (routes) -> {
             publishProviderState();
 
             boolean sessionInfoChanged;
@@ -130,11 +131,12 @@ class SystemMediaRoute2Provider extends MediaRoute2Provider {
 
         IntentFilter intentFilter = new IntentFilter(AudioManager.VOLUME_CHANGED_ACTION);
         intentFilter.addAction(AudioManager.STREAM_DEVICES_CHANGED_ACTION);
-        mContext.registerReceiver(new AudioManagerBroadcastReceiver(), intentFilter);
+        mContext.registerReceiverAsUser(new AudioManagerBroadcastReceiver(), user,
+                intentFilter, null, null);
 
         if (mBtRouteProvider != null) {
             mHandler.post(() -> {
-                mBtRouteProvider.start();
+                mBtRouteProvider.start(user);
                 notifyProviderState();
             });
         }