SkAR Java: refactored SkARMatrix.java (now CanvasMatrixUtil.java)

Bug: skia:
Change-Id: I57ff2f723b2445270246c96ee35e9669e2b21954
Reviewed-on: https://skia-review.googlesource.com/143503
Reviewed-by: Mike Reed <reed@google.com>
1 file changed