Add HW-filtered masks to thread-safe cache

Bug: 1108408
Change-Id: Iace1cea1c79a1f505a5b4da3a4d4c1a713e142ba
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/323505
Reviewed-by: Adlai Holler <adlai@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
6 files changed