BView-related code removed or disabled, of course, but this now uses the ColorConversions class, and adds some more ImportBits APIs from that. Change-Id: I805cef159bac52173ef16030eae69e83db6f061b Reviewed-on: https://review.haiku-os.org/c/haiku/+/9391 Reviewed-by: waddlesplash <[email protected]>