code: public void addBluetoothRoute() {
      updateBluetoothAudioRoute(BLUETOOTH_DEVICE_NAME);
  
      if (RuntimeEnvironment.getApiLevel() <= JELLY_BEAN_MR1) {
        ReflectionHelpers.callInstanceMethod(
            MediaRouter.class,
            realObject,
            "selectRouteInt",
            ClassParameter.from(int.class, MediaRouter.ROUTE_TYPE_LIVE_AUDIO),
            ClassParameter.from(RouteInfo.class, getBluetoothA2dpRoute()));
      } else {
        realObject.selectRoute(MediaRouter.ROUTE_TYPE_LIVE_AUDIO, getBluetoothA2dpRoute());
      }
    }
docs: Adds the Bluetooth A2DP route and ensures it's the selected route, simulating connecting a
  Bluetooth device.