[1/2] Base: support showing carrier/provider logo on statusbar

fix icon size, thanks @alex cruz
allow show/hide logo
not showing if device wifi only or no logo

Change-Id: I98e70258af574ba42d0aa58853bf531e575f8d13

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/res/layout/status_bar.xml
	packages/SystemUI/res/values/custom_dimens.xml
	packages/SystemUI/src/com/android/systemui/statusbar/SignalClusterView.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java