Merge "Document behavior of object references in Animator classes" into nyc-dev am: faa5726
am: f84e71b

* commit 'f84e71b556195531b1a2c799c43b3c23134dfee9':
  Document behavior of object references in Animator classes

Change-Id: Ic91150268685fc411a3b7d49b9ea94b3cc65f53f