Update FragmentProcessor TextureSampler to hold an GrSurfaceProxyView.

In future CLs I will update the Ops that create the TextureSamplers to pass
the GrSurfaceProxyView in.

Bug: skia:9556
Change-Id: I550dab64974d32e4c3047188063efa2d0832328e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/259164
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
26 files changed