Port battery saver mode: updates (2/2)

credits Yanuar Harry<ai.the.smarties.physics@gmail.com>

originally ported from Dan Trifan <jimsth@gmail.com>

Signed-off-by: hany <hany.alsamman@gmail.com>

Conflicts:
	res/values/probam_strings.xml
	res/xml/battery_saver_settings.xml
	src/com/android/settings/probam/BatterySaverSettings.java