Changes to GrCoordTransform and local coords

*Don't track vertex-shader status per-coord transform, just at FP level

*Remove outdated "in processor" checks

*Adjust "uses local coords" on FP to consider whether coord transforms
 actually transform local coords or custom coords

*Remove unused accessMatrix() method

*Don't track normalization and y-flipping separately from proxy

*Rename some things for clarity

*Simplify FPCoordTransformHandler

Change-Id: Ic493afc82bd949bbab177d33111a1942e33f88a9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/256101
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
16 files changed