[Graphite] Add support for Context and Recorder freeGpuResources call.

Bug: b/279467963
Change-Id: Ic9d147034c7428432c3e7c77779250aa59ffad48
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/746785
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
13 files changed