Agora RTC Objective-C API Reference Refactor

### - w -

- width : AgoraEncodedVideoFrameInfo , AgoraExtVideoFrame , AgoraFacePositionInfo , AgoraMediaRecorderConfiguration , AgoraMetaSceneDisplayConfig , AgoraOutputVideoFrame , AgoraRtcRemoteVideoStats , AgoraVideoFilterFrame , AgoraVideoLayout , AgoraVideoLayoutInfo , WatermarkBuffer
- wifiRxBytes : AgoraMultipathStats
- wifiTxBytes : AgoraMultipathStats
- windowFocus : AgoraScreenCaptureParameters