Revert "Revert "Base: bring back Wifi tile activity indicator""

This reverts commit 1528b2e98d149ad10cd9dcaadfe19d9782a09556.
Revert "Base: bring back Wifi tile activity indicator"

This reverts commit 85545edf40c3e94b3865000e8aa4e31cd1374d73.

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsModel.java
Bring NavigationBarTransitions inline with Slim