Settings: Forward port Performance settings

Change-Id: Ib510b35fc2763c6942737afa33873aa5d349a173

Conflicts:
	AndroidManifest.xml
	res/drawable-hdpi/ic_settings_performance.png
	res/drawable-mdpi/ic_settings_performance.png
	res/drawable-xhdpi/ic_settings_performance.png
	res/values/strings.xml
	res/xml/settings_headers.xml