Add onPrePrepare to GrFillRRectOp

As the first real op to be updated this required the plumbing of the DstProxyView and the de-constification of the GrAppliedClip.

Bug: skia:9455
Change-Id: Ieaa16adfa1d114021b2ad60d0ef8ecbe31d9cc82
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/255136
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
15 files changed