Agora RTC Objective-C API Reference Refactor

### - d -

- d3d11_texture_2d : ExternalVideoFrame
- d3d11Texture2d : VideoFrame
- data : AlphaChannel , PaddedRawPixelBuffer , RawPixelBuffer
- data_ : AudioPcmFrame
- data_size : InputSeiData
- dataChannelId : DataChannelInfo
- dataLength : AudioSpectrumData
- datastreamEncryptionEnabled : EncryptionConfig
- decoderOutputFrameRate : RemoteVideoStats , RemoteVideoTrackStats
- decodeTimeMs : EncodedVideoFrameInfo
- defaultLayout : PublisherConfiguration
- defaultToSpeaker : AudioSessionConfiguration
- defaultVideoStreamType : ChannelMediaOptions
- degradationPreference : VideoEncoderConfiguration
- delay : RemoteVideoStats , RemoteVideoTrackStats
- delay_estimate_ms : RemoteAudioTrackStats
- delay_median_ms : ILocalUser::AudioProcessingStats
- delay_ms : ILocalUser::AudioProcessingStats
- delay_standard_deviation_ms : ILocalUser::AudioProcessingStats
- destCount : ChannelMediaRelayConfiguration
- destInfos : ChannelMediaRelayConfiguration
- deviceId : PlayerUpdatedInfo , AudioDeviceInfo , CameraCapturerConfiguration
- deviceName : AudioDeviceInfo , LoopbackRecordingOption
- dimensions : IScreenCaptureSource::VideoCaptureConfig , ScreenCaptureParameters , SimulcastStreamConfig , VideoEncoderConfiguration
- displayId : ScreenCaptureConfiguration
- divergent_filter_fraction : ILocalUser::AudioProcessingStats
- domainLimit : AgoraServiceConfiguration , RtcEngineContext
- domainList : LocalAccessPointConfiguration
- domainListSize : LocalAccessPointConfiguration
- downlink_effect_type : RemoteAudioTrackStats
- downlink_process_time_ms : RemoteAudioTrackStats , RemoteVideoTrackStats
- downlinkReport : LastmileProbeResult
- downloadSize : CacheStatistics
- drop_fps : ScreenCaptureProfilingStatistics
- dropped_audio_frames : ILocalAudioTrack::LocalAudioTrackStats
- dtx_action_counter : ILocalUser::ANAStats
- dualStreamEnabled : LocalVideoStats
- duration : PlayerStreamInfo , RtcStats
- durationMs : RecorderInfo