use SkFontHinting from SkFontTypes.h

Bug: skia:2664
Change-Id: Id10cd5efe79681411ce556874fd89ca7624909f7
Reviewed-on: https://skia-review.googlesource.com/c/168267
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
12 files changed