Structure locales in Android NDK font manager

Fixes lookups with "und" as the language. Fixes ASCII case insensitive
comparisons. Improves lookup time by reducing the number of SkStrings
created.

Change-Id: Ia4ffb3e01af0aaf93e6202d15ca0ce795a98e808
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1046176
Reviewed-by: Julia Lavrova <jlavrova@google.com>
1 file changed