Update examples to use SkFont

Bug: skia:
Change-Id: I104e1382a035f7b1e0d8f4bf37859e2544166788
Reviewed-on: https://skia-review.googlesource.com/c/192039
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Mike Reed <reed@google.com>
8 files changed