AVRCP CT: Add support to send stop command

            // TRACK_EVENT should be fired eventually and the UI should be hence updated.

        }

        // These are not yet supported.

        @Override

        public void onStop() {

            Log.d(TAG, "onStop");

            mAvrcpCommandQueue.obtainMessage(

                    MSG_AVRCP_PASSTHRU, AvrcpControllerService.PASS_THRU_CMD_ID_STOP)

                    .sendToTarget();

        }

        // These are not yet supported.

        @Override

        public void onCustomAction(String action, Bundle extras) {

            Log.d(TAG, "onCustomAction action=" + action + " extras=" + extras);