Use GrMatrixEffect in gradients instead of GrCoordTransform

Bug: skia:10416
Change-Id: I8eefbd09ebde0b44e4a7dfafe32351f903c8a31c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/298983
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
12 files changed