Relax YCbCrVkDescriptor comparison

With graphite, begin access on a video texture fails when there
was a YCbCr info mismatch. This was added to address a case where the
promise image had no YCbCr info but fulfillment texture did. That caused
a mismatch in the configuration of dawn BindGroupLayout vs BindGroup
that crashed.

The same check is failing for minor mismatches in YCbCrVkDescriptor and
causing the frame to be skipped. It seems better to draw the video with
colors being a bit off than not drawing it at all. Relax the comparison
to just look at formats and forceExplicitReconstruction.  Chrome never
uses the later so it should always be false thus seems safe to compare.

Bug: 383528569
Change-Id: Ieb19549ef758942477ae57d23500c89d96c1b174
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6106519
Commit-Queue: Kyle Charbonneau <kylechar@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1398586}