Move the maskStyle into the GrGlyph

Change-Id: I560e909a9d1882ae6777915e165c740b3751e544
Reviewed-on: https://skia-review.googlesource.com/c/179382
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Herb Derby <herb@google.com>
2 files changed