NGA sorting playground

Change-Id: Ib73dd51f3f558aa6c6b98aa611da116d8906bf7f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/397284
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
8 files changed