[Graphite] Share VkInterface between Ganesh and Graphite.

Bug: b/243011979
Change-Id: I1d9ab7f79bc4c723fc7632b19ce302966acbd1c1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/572663
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Nicolette Prevost <nicolettep@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
20 files changed