Fix compatible format check for vkCmdCopyImage.

Change-Id: I4553bbdb7be5f5bd9e6efc12f4e3aba7557c4549
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/213133
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
3 files changed