Returning the layouts from an export operation and then using
them in a subsequent import operation allows the import to preserve
the texture contents.
This fixes Vukan image wrapping on some AMD/NVIDIA devices.
Bug: dawn:200
Change-Id: Icbb6e759856d410bb69724b9f439bc3088756d19
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/28380
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>