Multiplanar: Support YCgCo as part of ToSkYUVColorSpace

Support YCgCo color space as part of gfx::ToSkYUVColorSpace method
since skia side support has landed [1].

[1] https://skia-review.googlesource.com/c/skia/+/833427

Bug: 41486014
Change-Id: Ia1639ec6f3cc9080cf10b0c0c688263d27311129
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5383911


Commit-Queue: Saifuddin Hitawala <hitawala@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1283985}