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 branch 'cm-10.2' of git://github.com/CyanogenMod/android_packages_apps_DSPManager into cm-10.2