Cache resolved typefaces by Unichar + SkFontStyle + locale

Bug: skia:9983
Change-Id: I0dbb1cc72b95f896f21b4588a0c935c0dcdf9439
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/275463
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Julia Lavrova <jlavrova@google.com>
2 files changed