[androidkit] add getter for matrices

Change-Id: I0fd42b2506d794622852bd55aa4e8c2545216312
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/407916
Commit-Queue: Jorge Betancourt <jmbetancourt@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
2 files changed