Add a typeface to the HelloWorld example.

This goes back to a thread in skia-discuss from October where a client
didn't see any text in the example due to their font fallback not
working. This CL addresses that.

Change-Id: Ie59eed321677be5eec5a388df81448bcde875956
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/802860
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
2 files changed