成员的完整列表，这些成员属于 com.netease.lava.nertc.sdk.live.NERtcLiveStreamTaskInfo.NERtcLiveStreamLayoutMode,包括所有继承而来的类成员

layoutAudioOnly	com.netease.lava.nertc.sdk.live.NERtcLiveStreamTaskInfo.NERtcLiveStreamLayoutMode
layoutCustom	com.netease.lava.nertc.sdk.live.NERtcLiveStreamTaskInfo.NERtcLiveStreamLayoutMode
layoutFloatingLeftVertical	com.netease.lava.nertc.sdk.live.NERtcLiveStreamTaskInfo.NERtcLiveStreamLayoutMode
layoutFloatingRightVertical	com.netease.lava.nertc.sdk.live.NERtcLiveStreamTaskInfo.NERtcLiveStreamLayoutMode
layoutSplitScreen	com.netease.lava.nertc.sdk.live.NERtcLiveStreamTaskInfo.NERtcLiveStreamLayoutMode
layoutSplitScreenScaling	com.netease.lava.nertc.sdk.live.NERtcLiveStreamTaskInfo.NERtcLiveStreamLayoutMode
layoutSubscribe	com.netease.lava.nertc.sdk.live.NERtcLiveStreamTaskInfo.NERtcLiveStreamLayoutMode