Eleven: Fix default art color in notification

The key being passed in did not match in some cases causing this problem

Change-Id: Ibbd985d6f0fb0ff3fb90908481f8180715cf2ec7
Eleven: Add missing mdpi/hdpi/xhdpi drawables

Fix crash on builds that don't include xxhdpi drawables.

Change-Id: I4b90575939f0b7f696279ec6353f6c91fcc1f9f4
Eleven: Add more missing mdpi/hdpi/xhdpi drawables

And remove couple of unused drawables while at it.

Change-Id: I9973c625e1f0922cf9f1c91729409a2a1dc0a83c
Eleven: Remove tracks that give problems from the queue and warn

Instead of playing the tracks over and over, remove it from the queue
Also pop up a warning if the music player is active

Change-Id: I1d4e5a049b69de381f1a7f86ce2b837449bc378f