Implement font family names on iOS.

Tries to find and use newer API if available, with fallback to
older API as needed.

This also fixes family names for custom font collections.

Bug: skia:10850
Change-Id: Ie3c3cc5f342c78cbe0015584d84063435358e59e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/332177
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
1 file changed