Modify VectorDrawable to scale path through canvas matrix

Apply the path matrix to the canvas instead of creating a new path.
Delete logic that scales the stroke, because this is done through
the matrix as well. Merge/delete some functions.

Bug: 36392701
Test: CTS graphics tests pass with minor changes in 6 golden images.
Quick settings and settings app drawables are OK. Vector icon app
draws identical paths.
Change-Id: If623bc0a535fad95a2839f79bd997c016bcd9d4d