Change Flutter to always use analytic AA

Bug: skia:14232
Change-Id: I3831b2f1eb86ad4535e40947f3853321161dc199
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/673656
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed