Clean up time

-Resized a few drawables that bothered me
-Changed Interface icon (credit RootBox)
-Moved Performance header under Carbon
-Added cLock preferences back under Interface
-Fixed a few more strings

Change-Id: I08e01e8c0c7ff5f3b9ed17e9232307c260e3c0c1

Conflicts:
	res/drawable-hdpi/ic_carbon_interface.png
	res/drawable-hdpi/ic_carbon_powerwidget.png
	res/drawable-hdpi/ic_rom_control_ribbon.png
	res/drawable-hdpi/ic_settings_performance.png
	res/drawable-xhdpi/ic_crom_performance.png
	res/values/strings.xml
	res/xml/settings_headers.xml