Simpler SkYUVAPixmapInfo construction

Bug: skia:10632
Change-Id: I40636d004f8458b3eb578caeeb9e77594ce8bc54
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/313908
Auto-Submit: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
2 files changed