Frameworks: recreate on theme change SlimPIE as well

like the navigation bar commit let us reconstruct pie
on theme change as well

Change-Id: I36d596dc1677dbc0cc5fb8ed8ad725f717698285

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
Frameworks: reduce SlimPie observer footprint (1/2)

time for code cleanup projects. Switch to same
logic we already use in QS/NT shortcuts. Use
only one string for the whole SlimPie config
This reduces massive the observer footprint.

cheers

Change-Id: I884c5d25c682e06d6649a16c2ba6d84460a3776f