Merge "Framework Support Library: Ensure addSharedElement on TransitionHelper is only called on non-null views" into mnc-ub-dev am: 7b5870b264
am: 26e0dbbf31

* commit '26e0dbbf311b833ae55f760c8c8cb00cc057420f':
  Framework Support Library: Ensure addSharedElement on TransitionHelper is only called on non-null views