[graphite] Set up snippetID and data for YUV shader

Bug: b/238756380
Change-Id: Id8de27ff9283d15dfc7b2a348547ebc7275ad136
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/696863
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
4 files changed