[skottie] Optional path control points

Make parsing the in/out Bezier control points optional (default [0,0]).

Change-Id: Id1ef43cea133fab3a112e653d4ce2ab21b91effb
Reviewed-on: https://skia-review.googlesource.com/c/159980
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
1 file changed