[graphite] Add Caps::supportsAHardwareBufferImages

Change-Id: Ib9ad8086d54aa6dd58c7bb9bcefc864a27f7c8e8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/789157
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Nicolette Prevost <nicolettep@google.com>
2 files changed