[canvaskit] Move to using SkFont instead of SkPaint.measure*

Bug: skia:
Change-Id: I72a744f58072f0bc5f9cad561c4367ff5d32e5ab
Reviewed-on: https://skia-review.googlesource.com/c/180643
Reviewed-by: Mike Reed <reed@google.com>
4 files changed