Remove use of isConfigRenderable.

Bug: skia:6718
Change-Id: I7eb25601e55042252a4fdcddfa4bb906ce0307dd
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/231108
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
12 files changed