DSPManager: Holo-ify equalizer surface

Use holo_blue as the base color for the equalizer surface
to not clash with the rest of the system colors. Reduce
the size of the control handles so they are not so large
on xlarge displays.

Change-Id: Ice4b9f9a4a50ff5e925ee8898d41894c615cc2e7
DSPManager: update action bar / indicator

This commit updates the look of the ActionBar to be more
consistent with other CM apps (mainly Apollo.) Switches from tabs
to PagerTabStrip to be more consistent as well. Create theme
resources so more items can be added at a later time to complete
the look.

Change-Id: I0df6af2941e3d3f370144f8ed469880b7e15ff61

Conflicts:
	res/values/colors.xml
DSPManager: Add xhdpi launcher icon, cleanup others a bit.

Change-Id: I179cc40913c830d4d26f383ed1df2c4d4b0fa9a2