Merge "MediaBrowser: Use volatile keywords for variables used in multithreads"

    private final Handler mHandler = new Handler();

    private final ArrayMap<String, Subscription> mSubscriptions = new ArrayMap<>();

    private int mState = CONNECT_STATE_DISCONNECTED;

    private volatile int mState = CONNECT_STATE_DISCONNECTED;

    private volatile String mRootId;

    private volatile MediaSession.Token mMediaSessionToken;

    private volatile Bundle mExtras;

    private MediaServiceConnection mServiceConnection;

    private IMediaBrowserService mServiceBinder;

    private IMediaBrowserServiceCallbacks mServiceCallbacks;

    private String mRootId;

    private MediaSession.Token mMediaSessionToken;

    private Bundle mExtras;

    /**

     * Creates a media browser for the specified media browse service.