Migrate SK_strcasecmp to SkStringUtils.h.

This will let us use it elsewhere.

Change-Id: I39a5dc0651bee8fbd5fa7302e34a3a79f7efbd3d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/481736
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
3 files changed