profile: Add an option to reset everything (2/2)

For user to reset all profiles and groups by one click, without
deleting /data/system/profiles.xml and reboot. Depends on
http://review.cyanogenmod.com/8116

This is alternative of http://review.cyanogenmod.com/7625

Change-Id: I325e69862f9f248c76b69a9a6ac7b574e820a30f