Merge "SupportLeanbackshowcase: clean up preference fragment code" into nyc-dev am: 097514b34c am: 0ba81b53e9
am: 5913fe0f4a

* commit '5913fe0f4aa3ced92575240f78efd105e50f2eab':
  SupportLeanbackshowcase: clean up preference fragment code

Change-Id: I956508e09f8c6a9cb7ef677a58365b565c5785a2