StatusBar logic (1/2) WIP!

Currently the Statusbar can be hidden through various options. While this is on
though, notifications, signal, battery, etc cannot be seen. Sure you could just
unhide it real quick but Hidden Statusbar Pulldown allows you to swipe down and
reveal the Statusbar for a configurable amount of time before hiding again.
Thanks to blk_jack and Steve Spear for the help (im a java noob :D)
Change-Id: I486dae7cb2fb2be117932073925f2f7c0e1e873a