SystemUI: Network speed indicator (1/2)

Conflicts:

	core/java/android/provider/Settings.java
	packages/SystemUI/res/layout/status_bar.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

Conflicts:
	packages/SystemUI/res/layout/status_bar.xml

Conflicts:
	packages/SystemUI/res/layout/status_bar.xml