[skottie] Do not discard SkPath's FillType when interpolating

The fill type is not reflected in shape keyframes, but it is tracked in
the scene graph.  Make sure we don't overwrite when interpolating.

TBR=
Change-Id: I281a61c3f4181ce34f772b36b83d0c7a64e265f6
Reviewed-on: https://skia-review.googlesource.com/139176
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
1 file changed