Inset subset rect in texture op when nearest sampling

Fixes incorrect bleeding in bleed GM

Change-Id: I11337c068f531c59856ae5b5f6d9da765e2e5b0e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/290196
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed