Add debug trace ops to RP builder.

Change-Id: I65a654c966376fc284c03f94a3cda3e90a743d0f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/661596
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
3 files changed