[Fontations] Borrow glyph mask flag implementation from FreeType

Implement an efficient, single table check version for checking
onGlyphMaskNeedsCurrentColor().

Bug: b/301562314
Change-Id: I37cc5ed26ad6b1992e787d854d5cfe563825af5d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/763716
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Dominik Röttsches <drott@chromium.org>
2 files changed