Separate compressed and uncompressed texture functions

Change-Id: Iccf31e1e4dbebde8aab4bb9b57cfb0341bb05912
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/223802
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
31 files changed