RC: Move Statusbar brightness slider into statusbar fragment

Doesn't fit in the categories we have right now; put it at the top.

Suggested by Arnav.

Change-Id: I97dcda99841277dada12e3ab1a38801c24314b1b
Signed-off-by: Andrew Warfield <hiasant@gmail.com>
Merge "RC: Move Statusbar brightness slider into statusbar fragment" into kitkat