[graphite] Some clean up in CommandBuffer creation

Makes the Make() method consistent with other methods by passing in
Gpu, and adds hooks for command buffer tracking.

Bug: skia:12466
Change-Id: If93c2126b1296dcbf788b5471916051fe90dafdf
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/457319
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
6 files changed