MediaPlayer macOS 11.3 to 12.0 API Differences

MediaPlayerDefines.h
Removed #def MP_HAS_UIKIT
Added #def MP_FALLTHROUGH
Added #def MP_TYPE_PROTOCOL
Added #def MP_COMPLETION
Added #def MP_OVERLOAD
Added #def MP_FINAL_CLASS
Added #def MP_HAS
Added #def MP_HAS_HEADER