[graphite] Add support for UsageFlags on Texture.

Bug: skia:12466
Change-Id: Iee62164899742356abf15ae3bc3dec0e724a365d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/454743
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
5 files changed