AVKit tvOS 15.4 to 16.0 API Differences

AVKitDefines.h
Added #def AVKIT_ONLY_API_DEPRECATED_WITH_REPLACEMENT
Added #def AVKIT_INIT_UNAVAILABLE
AVPlaybackSpeed.h
Added AVPlaybackSpeed
Added AVPlaybackSpeed.systemDefaultSpeeds
Added -[AVPlaybackSpeed initWithRate:localizedName:]
Added AVPlaybackSpeed.rate
Added AVPlaybackSpeed.localizedName
Added AVPlaybackSpeed.localizedNumericName
AVPlaybackSpeedCollection.h
Added AVPlaybackSpeedCollection
Added +[AVPlaybackSpeedCollection defaultSpeedFromList:]
Added +[AVPlaybackSpeedCollection collectionWithSpeeds:]
Added AVPlaybackSpeedCollection.speeds
Added AVPlaybackSpeedCollection.selectedSpeed
Added -[AVPlaybackSpeedCollection selectSpeed:]
AVPlayerViewController.h
Added AVPlayerViewController.speeds
Added AVPlayerViewController.selectedSpeed
Added -[AVPlayerViewController selectSpeed:]