[2/2]Settings: OmniRom's Battery Saver mode
This is Omni's Battery Saver Mode, I used BeanStalk's squashed commit here:
https://github.com/scotthartbti/android_packages_apps_Settings/commit/363d6e0595a08d349a16dafa66b048cfefe05ad4

This goes with the frameworks/base part here:
https://github.com/MrApocalypse/frameworks_base/commit/ae0920b32d9257d7304ffb280aaf221aa7b97d49