[skottie] Improved text rendering

 * enable antialiasing
 * enable subpixel positioning
 * disable hinting

Change-Id: I7e861d9141411f64a9277ff6c3345c107c0868b2
Reviewed-on: https://skia-review.googlesource.com/148980
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2 files changed