Use analytic AA in FillRRectOp even if the target has MSAA

Bug: skia:11396
Change-Id: Ia29fd5c9f00006274bb2aa1db96fbad57d858786
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/380016
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
6 files changed