Moved the Napster.player.on(playtimer) into componendDidMount so we would only create one event listener instead of every time a song is clicked (this was causing the app to ignore the playback session error.)
Added the Napster.player.on(playsessionexpired) to componendDidMount so we can show the error message when we hit that error (doing the same thing we are doing on the Web App)
Fixed the tests that were failing due to the above changes
Story: https://napster.atlassian.net/browse/NP-303