Eleven: Show error message for corrupt tracks (additional codepaths)

Add showing error message for code paths where the media player fails gracefully
Unfortunately adding the logic to remove the bad track is not trivial because the
removeTracks logic automatically does other things to try to go to the next track.
For now I will leave the logic so that it goes on to the next track and make a note
on the music service rewrite notes to cover this scenario as well.

Change-Id: Ib7ae5ce7819b15cdb3ada4995bc0734ab2d9b0a2
Eleven: materialize

-Material Ui theme
-New launcher icon
-Better tabs

Change-Id: I712ac2eb5256841cf89d198eed775ce8afe9d09c
Make buttons more touch friendly.

Do this by replacing margins and empty space around buttons by padding.
Doing this also makes the ripple touch feedback look better.

Change-Id: I7f2e933b9f7b481c9456f56860483c2e5e96b67b
Merge remote-tracking branch 'upstream/cm-12.0' into cm-12.0