Agora RTC Objective-C API Reference Refactor

### - d -

- data : AgoraMemPixelBuffer
- dataBuf : AgoraVideoFrame
- datastreamEncryptionEnabled : AgoraEncryptionConfig
- decoderOutputFrameRate : AgoraRtcRemoteVideoStats
- decodeTimeMs : AgoraEncodedVideoFrameInfo
- defaultVideoStreamType : AgoraRtcChannelMediaOptions
- delay : AgoraRtcRemoteVideoStats
- delegate : AgoraLiveKit , AgoraMetachatConfig , AgoraMetachatSceneConfig , AgoraRtcEngineKit
- deployRegion : AgoraCloudSpatialAudioConfig
- desc : AgoraMetachatBundleInfo , AgoraMetachatSceneInfo
- destinationInfos : AgoraChannelMediaRelayConfiguration
- deviceId : AgoraCameraCapturerConfiguration , AgoraMediaPlayerUpdatedInfo
- dimensions : AgoraCameraCapturerConfiguration , AgoraScreenCaptureParameters , AgoraScreenVideoParameters , AgoraSimulcastStreamConfig
- distance : AgoraFacePositionInfo
- domainLimit : AgoraRtcEngineConfig
- domainList : AgoraLocalAccessPointConfiguration
- downlinkReport : AgoraLastmileProbeResult
- downloadSize : AgoraMediaPlayerCacheStatistics
- duration : AgoraChannelStats , AgoraRtcMediaStreamInfo
- durationMs : AgoraMediaRecorderInfo
- durationS : AgoraMusic