[graphite] Use X-macro to get better UniqueKey printouts

Also add a Precompilation version of the Luma ColorFilter to test it out.

Bug: b/259548724
Bug: b/238759147
Change-Id: I6ca45ae3edcd38c17f604bda96220bc935b75b01
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/833300
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
5 files changed