Use FillRRectOp in drawStrokedLine for dmsaa This makes it so we don't trigger msaa in drawStrokedLine anymore. Bug: skia:skia:12872 Change-Id: Id68b55ba9e3989f2a775affe9a1b20bf3186123c Reviewed-on: https://skia-review.googlesource.com/c/skia/+/502816 Reviewed-by: Greg Daniel <egdaniel@google.com> Commit-Queue: Christopher Dalton <csmartdalton@google.com>