audioPublishStateChanged property Null safety
read / write
音频发布状态改变回调。
StreamPublishStateCallback 包含如下参数：
- String
channel频道名。 - StreamPublishState
oldState之前的发布状态。 - StreamPublishState
newState当前的发布状态。 - int
elapseSinceLastState两次状态变化时间间隔（毫秒）。
Implementation
StreamPublishStateCallback? audioPublishStateChanged;
