Update travis build tools from 22.0.1 to 23.0.1
Update travis build tools from 22.0.1 to 23.0.1

Change-Id: I6a19bb9f3176f3710ef12c74022a9a1629d71def

dejavu1988/digits-android,jaydeep17/digits-android,dejavu1988/digits-android,jaydeep17/digits-android,twitter/digits-android,twitter/digits-android