检查用户是否已授权在 WebPlayer 中使用网络摄像头或麦克风。
This is used to check the result of a previous call to [[]]. Explicit user consent to use features is only needed in the Web Player. In other build targets, this function will always return true.
**注意：**5.4.0 及更高版本不支持 Web 播放器。