Return to the old-fashioned device settings option

And move headset connect option to sound settings

Change-Id: Id4325d1e135a8ebaa309e1c5ef95c042538cea56
Add configuraion for showing statusbar on top of fullscreen window.

Change-Id: Id060de4f02a458aff92a965b557ff430c586ae41
Add configuration for autounhiding statusbar on new notification.

Change-Id: Ie18606e8e41cab70997976722544b4891a2188c9