Add more clarity to why we use GrWrapCacheable::kYes in AHWB generator.

Change-Id: Ica5542466ef8db1c72506edebd1360b27e65dab6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/378779
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed