Check if now playing list is updated by comparing the current queue (1/3)

Bug: 64686424
Test: Connect to carkit and see that NowPlayingChanged only gets sent when the queue changes
Change-Id: I5da15e466462eaf88ab4918af38c19231adaeea3
(cherry picked from commit ef56c5471dda0dc624d99a18506f8c9330ed8327)
1 file changed