[ganesh] Check result inside GrResourceProvider::writePixels Bug: 540027341 Fixed: 540027341 Change-Id: Icde9d077dfb3ec3cdb7a6e775c6472443dba8781 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1315336 Auto-Submit: Michael Ludwig <michaelludwig@google.com> Reviewed-by: Robert Phillips <robertphillips@google.com> Commit-Queue: Robert Phillips <robertphillips@google.com>