Add support for wrap modes to GrYUVtoRGBEffect.

In support of this add support for border color to GrTextureEffect.
Currently non-zero border colors are always emulated in shader code.

Change-Id: I007e264411d713f8afaf8f160b6cea6d0f35c753
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/274282
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
6 files changed