Add recents ram bar and low battery indicator options, (1/2):

From CM10.1:

Recents ram bar:
https://github.com/XXMrHyde/android_packages_apps_Settings/commit/16fb030e84bede6e23e9daed07e01c2df33a1a83

Low battery indicator options:
https://github.com/XXMrHyde/android_packages_apps_Settings/commit/e399c6f6ef3b715a037496cbba5059ea5d963990

Change-Id: I8096e5bf19ed27012852efecb1d8532e8ff9b71f