ccpr: Fix debug counters for stencil resolve instances

TBR=robertphillips@google.com

Bug: skia:
Change-Id: I7ddc477b61472549aff047afae51810378534aa4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/228838
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
2 files changed