Handle surrogates in SkUTF::UTF16ToUTF8

Change-Id: Ib2e34aaa49520328660cf5df1998dd50f6f07fbb
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/319176
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Commit-Queue: Jason Simmons <jsimmons@google.com>
1 file changed