Stop including SkCanvas.h from GrTypesPriv.h

It was too easy to get into circular include chains. Added static
asserts to ensure we keep our quad AA flags in sync. Also, IWYU.

Change-Id: I01aefa264aa56420ab5a46a8ecd9e63c021c79ab
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/280405
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
12 files changed