[graphite] Track plot information and use it for conditional uploads

Bug: b/246953695
Change-Id: Ia68987e39f57d3315ba046699987c11a6681d6ee
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/620850
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
5 files changed