onNetworkQuality property Null safety

OnNetworkQualityType? onNetworkQuality

加入房间后， 以 2 秒 1 次的频率，报告用户的网络质量信息

更多通话中的监测接口，详见通话中质量监测

Implementation

OnNetworkQualityType? get onNetworkQuality;
void onNetworkQuality=(OnNetworkQualityType? onNetworkQuality)

Implementation

set onNetworkQuality(OnNetworkQualityType? onNetworkQuality);