[Graphite] Track CommandBuffer refs for textures instead of Usage on CommandBuffer.

Bug: b/309791098
Change-Id: I2f5b78d5ce2644ffe1a28e150224e604715ab9d2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/784550
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: James Godfrey-Kittle <jamesgk@google.com>
17 files changed