[skottie] Plumb square selector "smoothness" prop

Requires https://github.com/bodymovin/bodymovin-extension/pull/22

Change-Id: I2614aeefce18f4b3e6c6373cd5503a7696253a76
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/238436
Auto-Submit: Florin Malita <fmalita@chromium.org>
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
2 files changed