[LottieWeb] Fix frames

goToAndStop() apparently just counts from frame 0 to frame n, so no
need to do complicated in/out stuff.

Bug: skia:
Change-Id: Ia9c9e2b29377ea0f41fee72a6f0677e236ebcedc
Reviewed-on: https://skia-review.googlesource.com/150360
Reviewed-by: Kevin Lubick <kjlubick@google.com>
1 file changed