SupportLeanbackshowcase: update songs and metadata am: 15f4055a2e
am: 322844393e

* commit '322844393e42dea9caeef2b196d8c445b5d06ed0':
  SupportLeanbackshowcase: update songs and metadata

Change-Id: I1ae5d8508c5338828f32bb0860c42688dbc5cdea