hide non-blob versions of getTextIntercepts

likely will move this to SkFont soon

Bug: skia:
Change-Id: I53a6d9114c9e8768a50951e96284d10bda83285b
Reviewed-on: https://skia-review.googlesource.com/c/175434
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
3 files changed