[Graphite] Share vulkan memory helpers between Ganesh and Graphite.

Bug: b/257269534
Change-Id: I3f84b91446019df3af6e39d07ee9e604e68df3f4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/601317
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
13 files changed