Revert "SystemUI: Fix crash during notification/theme change"

This reverts commit 7c930011ee6cc55e5474d4742ca125529f9b823a.

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
Revert "Disable ticker preference [1/2]"

This reverts commit c91e0f65a5cfcbb959f24e9cc0556af19f89814b.