DSPManager: Add xhdpi launcher icon, cleanup others a bit.

Change-Id: I179cc40913c830d4d26f383ed1df2c4d4b0fa9a2
Merge "DSPManager: Add xhdpi launcher icon, cleanup others a bit." into cm-10.2
Merge remote-tracking branch 'upstream/cm-10.2' into HEAD

Conflicts:
	res/drawable-hdpi/icon.png
	res/drawable-ldpi/icon.png
	res/drawable-mdpi/icon.png

Change-Id: I659e73fc4a38e15e7c21da0b091a5a05fe047209