decoder: videotoolbox: attach color properties to image buffers
requested to merge umxprime/vlc:umxprime/4.x/decoder/videotoolbox/attach-image-buffers-color-properties into master
VideoToolbox decoder doesn't attach all color properties to image buffers.
Current display modules handle tonemap without them, but attaching additional color properties to image buffers is mandatory for native image buffer display on macOS, in order to have proper colors tonemap when AVFoundation APIs are used to render them and prevent flickering while using multiple displays with different ColorSync profiles.