[SIPool] Add GrSurfaceOrigin and SkAlphaType getters in

ClientSharedImage.

Add methods to get GrSurfaceOrigin and SkAlphaType to ClientSharedImage.
These methods are needed by SharedImagePool during ImageInfo comparison.

Bug: 361128461
Change-Id: Ie807304d72fcd74f1db21174077d8b817b573e92
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5828470


Commit-Queue: vikas soni <vikassoni@chromium.org>
Auto-Submit: vikas soni <vikassoni@chromium.org>
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Commit-Queue: Vasiliy Telezhnikov <vasilyt@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1349461}