Use samplingoptions in imageshader

Change-Id: I7d94fe7aed702afd0626a40db201caaf7c2a7764
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/342927
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
16 files changed