Reland "[graphite] Add AHARDWAREBUFFER_FORMAT_B8G8R8A8_UNORM support"

This is a reland of commit 2b273431466193e5b257417e241ae597531846af

Original change's description:
> [graphite] Add AHARDWAREBUFFER_FORMAT_B8G8R8A8_UNORM support
>
> Change-Id: I21ee1d15bbcd8e5ca87e040464756ecc43e49472
> Bug: b/431290055
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1028696
> Commit-Queue: Nicolette Prevost <nicolettep@google.com>
> Reviewed-by: Michael Ludwig <michaelludwig@google.com>
> Commit-Queue: Michael Ludwig <michaelludwig@google.com>
> Auto-Submit: Nicolette Prevost <nicolettep@google.com>

Bug: b/431290055
Change-Id: I18241636c656773cf3efae340b7edb40fa8f3d07
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1029296
Commit-Queue: Nicolette Prevost <nicolettep@google.com>
Reviewed-by: Noelle Scobie <nscobie@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
1 file changed