Network speed indicator in statusbar (see credit below)

Credit and Thanks to htchoi1995 and LorDClockaN

Change-Id: I7e8f597f629563763e93a9967f00a9f48eed1d6c

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