Forward port battery icon options [1/2]

Bring forward the various battery icon options.
Portrait, Landscape, Circle, Text.

Still retains new options for where to display battery percentage text.

Change-Id: Icfc14d989eebde9014538291c24aa76d328df234

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardStatusBarView.java
Fix memory leak in system_server when screen on/off

Change-Id: I3ed7be519fc9301dd45d162773a6d0d62de12d76
SystemUI: status bar brightness: store value as int

Non-automatic brightness value is stored as int, not float.

Symptom: adjust the brightness in the status bar, the brightness
         slider in the notification bar will always be set to full

Change-Id: I5f9a6e97bae2c44c3aff7c9222186a6dbda5d902