[lottiecap] Fix timestamp calculation to exactly match skottie in DM.

Also use the much faster goToAndStop() call.

Bug: skia:
Change-Id: I22b8ac2b3d2fd70da4b396cb6b4ad50485a6f408
Reviewed-on: https://skia-review.googlesource.com/115324
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
1 file changed