成员的完整列表，这些成员属于 RtcEngine::Configuration,包括所有继承而来的类成员

appId	RtcEngine::Configuration
audioAecType	RtcEngine::Configuration
audioScenario	RtcEngine::Configuration
callback	RtcEngine::Configuration
rtcServer	RtcEngine::Configuration
videoHwAcceleration	RtcEngine::Configuration