NIMSignalingInviteRequest 成员列表

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

	accountId	NIMSignalingInviteRequest
	channelId	NIMSignalingInviteRequest
	customInfo	NIMSignalingInviteRequest
	offlineEnabled	NIMSignalingInviteRequest
	push	NIMSignalingInviteRequest
	requestId	NIMSignalingInviteRequest