SystemUI: Customize StatusBar for Chinese carrier

1. Add support to show sim status on status bar pull down curtain
   if sim is absent or missing.
2. Add values-w320dp to adapt lower resolution device.
3. Update Chinese roaming string.
4. Optionally, disable BT and Wifi switch on quick setting panel if
   it is under airplane mode as Chinese carrier required.
5. Switch positions of sub1 and sub3 on status bar.
6. Redesign the scheme of selecting icons on signal cluster.
   Customized SigalClusterView and MSimSiganlClusterView to adapt
   requirement from Chinese carriers. The customization is controller
   by config values defined in overlayed config.xml.

Change-Id: I92ad6eabbec3b310c75eb2d41b3345a7169c488c

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/SignalClusterView.java
	packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkControllerImpl.java