pause method
The video is paused and must be called when the player starts playing.
视频暂停,必须在播放器开始播放的时候调用
Implementation
@override
Future<void> pause() async {
if (_isNeedDisposed) return;
await _initPlayer.future;
await _livePlayerApi.pause(PlayerMsg()..playerId = _playerId);
if (_state != TXPlayerState.paused) _changeState(TXPlayerState.paused);
}