AudioService : Ensure uri is not null

Checks to make sure the uri is not null, otherwise the entire
subsystem crashes.

Change-Id: Iac04b6d11335236d527b8d5a1ccb48c1e09a4ac2
Show owner info creation if no owner is set for UserTile

Change-Id: I43575946023676a1b75b67e1ae1996a0a3a35b88
Merge "Show owner info creation if no owner is set for UserTile" into cm-10.2