AVFoundation macOS 10.15 Beta 4 to Beta 5 API Differences

../Frameworks/AVFAudio.framework/Headers/AVAudioUnitComponent.h

Added AVAudioUnitComponentManagerRegistrationsChangedNotification

AVPlayer.h

Added AVPlayer.eligibleForHDRPlayback

Added AVPlayerEligibleForHDRPlaybackDidChangeNotification

AVPlayerItem.h

Added AVPlayerItemMediaSelectionDidChangeNotification