WebCodecs/WebRTC VP9 color space is not correctly set for libvpx encoders
<rdar://problem/114963848>
Pull request: https://github.com/WebKit/WebKit/pull/17422
Committed 267638@main (8bf16504d7fa): <https://commits.webkit.org/267638@main> Reviewed commits have been landed. Closing PR #17422 and removing active labels.