Merge "Merge "Introduce ButtonInterface and getHomeId()" into nyc-mr1-dev am: 54c3213304" into nyc-mr1-dev-plus-aosp
am: 94d9bdb86d

* commit '94d9bdb86d375605f699d1d8f9784ab256db3a1b':
  Introduce ButtonInterface and getHomeId()

Change-Id: Id5b35fafb461100e02754d5901a555331c15f75a