[1/2] SystemUI: Network speed indicator

Change-Id: I88e7cdfe20342c695a33383db36bf80bb4ffe009

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/res/values/styles.xml
[1/2] ElectronBeam: Add an alternative screen-off animation

Adds a "scale down" screen-off effect. This is one experiment to see
how we can become more creative to make some cool screen-off anims.

Change-Id: I5f364512792d5723d3a8745169abdddda5959b92

Conflicts:
	services/java/com/android/server/power/DisplayPowerController.java