NIMSignalingJoinNotifyInfo 成员列表

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

	channelInfo	NIMSignalingNotifyInfo
	customInfo	NIMSignalingNotifyInfo
	eventType	NIMSignalingNotifyInfo
	fromAccountId	NIMSignalingNotifyInfo
	member	NIMSignalingJoinNotifyInfo
	time	NIMSignalingNotifyInfo