[skottie] Initial property setters
Introduce a PropertyObserver to receive property notifications for layer
and shape nodes.
Properties are communicated using strongly-typed "handles", which act
as impedance adapters between the AE/BM model and the internal Skottie
model.
Bug: skia:
Change-Id: Ieb9be1ff843673f1f4fe900d3774c36956b7c941
Reviewed-on: https://skia-review.googlesource.com/156186
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Mike Reed <reed@google.com>
11 files changed