SystemUI: 4G/LTE icon toggle

Change-Id: I6736efa45ea46701c8db2d5f51dd2fced359e483
Signed-off-by: Roman Birg <romanbirg@gmail.com>
Signed-off-by: Rohan Mathur <rohanmathur34@gmail.com>

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkController.java