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

* commit '90c02415ab9434413b2cb29e1513978da6cd4b7f':
  SupportLeanbackshowcase: update songs and metadata

Change-Id: I7d3da4550f001291f1f1b923d30c1f92cc731530