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

attendeeId (定义于 RtcEngine::ChannelConfiguration)	RtcEngine::ChannelConfiguration
mode	RtcEngine::ChannelConfiguration
serviceFlags	RtcEngine::ChannelConfiguration
subscribeAudioAll	RtcEngine::ChannelConfiguration
userName	RtcEngine::ChannelConfiguration