Draft: codec: videotoolbox: add utility function to attach color properties to a cvpx buffer
requested to merge umxprime/vlc:umxprime/4.x/decoder/videotoolbox/add-utility-function-to-map-attach-color-props-to-cvpx into master
This adds a utility function to map and attach video format color properties to a CoreVideo buffer.
depends on !4166 (merged)