Restore legacy SkMatrix::setRectToRect semantics

We used to reset the matrix on failure, but
https://skia-review.googlesource.com/c/skia/+/1031899 inadvertendly
changed that.

Change-Id: I047e0f924dab59d9009bfb955c08c2e4e2902d15
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1034676
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Florin Malita <fmalita@google.com>
2 files changed