Profiles: Bring-up and inject into Settings via IA

 * Make use of the new information architecture for the Settings app
   and place the status bar settings into System category.

 * Set intent priority to a value between those that Google uses for
   "Languages & input" and "Date & time" entried in order to place our
   preference in between those two.

 * Use empty summary so that the title is centered vertically,
   matching "Developer options" and "Reset" entries.

Change-Id: I732d51ef81df7af0ce2488cb935592d2d1f52cf5