SupportLeanbackshowcase: update songs and metadata am: 15f4055a2e am: 90c02415ab
am: 5a2ed80910

* commit '5a2ed809101d555687dc30029885f2e5f0efcfd4':
  SupportLeanbackshowcase: update songs and metadata

Change-Id: Ica042a00904ffe8ceceffd865e78978fc54c5cf5