Merge "Document behavior of object references in Animator classes" into nyc-dev am: faa5726
am: 5d9a186

* commit '5d9a18643560ece1b9a7d2ac3eafe6f73d8758ce':
  Document behavior of object references in Animator classes

Change-Id: Ib129009d0b571faa7d431a9f52954525a9f989a2