[1/3] base: allow disabling non intrusive incall ui

Change-Id: Ibe9c65f1fe024a859d98d96fd86199607a1060de
Fix Quick Settings tiles jerking down while animating to notifications view

Patch Set 2: Fixed in code rather than XML

cherry-picked to cm-11: fixes Quick Access Ribbons not appearing
when switching back from Quick Settings

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

Change-Id: I1689aa80a0fcb8ad17bcefc290b43a16079f7b88