Use gradle 2.2-20140904223451+0000

Change-Id: I4c7aad219e4b9e3ab246e5a50a1794cb0d53a343
Move wrapper prop to 2.1

Change-Id: Ib050a7c147867ae3d54f36f625808d7f3d3bc41b
Move wrapper prop to 2.1
automerge: 09fbd39  -s ours

* commit '09fbd3949bf1a6e0bf8861c3d5b75d0470c4025e':
  Move wrapper prop to 2.1