Merge "[Output Switcher] Use Thread-safe list to store mediaDevices in MediaManager" into tm-dev

    private static final String TAG = "MediaManager";

    protected final Collection<MediaDeviceCallback> mCallbacks = new CopyOnWriteArrayList<>();

    protected final List<MediaDevice> mMediaDevices = new ArrayList<>();

    protected final List<MediaDevice> mMediaDevices = new CopyOnWriteArrayList<>();

    protected Context mContext;

    protected Notification mNotification;