configure attributes for SkottieView to be initialized from XML layout

Change-Id: I9eb1702ed11f23873ffe7fbc60d9f9d885d3073c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/301716
Reviewed-by: Stan Iliev <stani@google.com>
Commit-Queue: Jorge Betancourt <jmbetancourt@google.com>
3 files changed