Adds YUV planar image to the compositor_quads_image GM, confirmed
locally that it uses the effect instead of flattening the planes
into a single proxy (like before).
Bug: skia:
Change-Id: I0dea16bbaae34ae44cb1b51db9d2953231a6bf22
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/201619
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
