Frameworks: Slims wifi and carrier label visibility control

Port from kitkat

abbility to show either carrier, wifi both or neither of this labels.

If you are building 'MSIM-Support Phone', You have to work this again with if(isMsim)

Change-Id: I0a951e8c620e8b0083470e0c0d3cd99a27589661

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java