volume rocker: volume key cursor control
status bar: battery level text

1. Add TextView to display battery level percentage next to the battery icon.
2. Remove support for displaying battery percentage on the actual battery icon itself.
3. Also respect view on lockscreen and opened notification drawer.

Conflicts:
	packages/SettingsProvider/res/values/defaults.xml
PackageManager: allow build-time disabling of components

Allow components to be specified as disabled at build time (applied on boot).
This allows stock OTA components to be marked as disabled

Conflicts:
	core/res/res/values/custom_config.xml
	core/res/res/values/custom_symbols.xml
status bar battery percentage: option for percentage inside icon

Conflicts:
	packages/SettingsProvider/res/values/defaults.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarHeaderView.java
fix battery context