Prepare flag to hide setFilterQuality

Bug: skia:7650
Change-Id: I9cfd6f87e2ca1eb5680e1ec83a029c6bfdbe7b2f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/370236
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
3 files changed