QuickSettings: Add LTE Tile (1 of 2)

Patchset 3 - Add proper drawables and update logic
Patchset 4 - Rebase
Patchset 5 - Fix build errors

Thank you to Bjorn Lunden for the drawables

Change-Id: Ia25d098020586e06d38589f84d3d1a581e7cbd9a

Conflicts:

	packages/SystemUI/res/values/strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsController.java

Fixes for LTE Toggle

Additional fixes for LTE toggle...

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsController.java
	packages/SystemUI/src/com/android/systemui/statusbar/tablet/NotificationPanel.java