Use bulk metrics call in SkFont

Unify the handling of glyph metrics data in SkFont.

Change-Id: Ie1ad2a96ba205c0ee4570d70461b9db0cd874918
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/224577
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
3 files changed