Merge "Less lazy child FragmentManager creation" into nyc-dev am: 6437dac3d9
am: 8dd12a52cc

* commit '8dd12a52cc422bd0f4894cac7d23bcb3cba19037':
  Less lazy child FragmentManager creation

Change-Id: I67296b51104728619a9be0b589fb17e5d25dcd66