FW: add switch to hide signal and wifi bars (1/2)

Change-Id: I8c2e9112bb28cf56cb55b0f993a4863c7af430be

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkController.java
Fix navigation bar view with phablet UI mode