Forward Port Tablet UI toggle

TODO: Fix DateView

Original Patch by Scott Brady <sbradymobile@gmail.com>

Change-Id: Ibc688afd5e643165a2ceeba9f832ed50e6af3715

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
	packages/SystemUI/src/com/android/systemui/statusbar/policy/DateView.java
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java