Add option to enable/disable navring (2/2)

This will add an option to toggle navigation ring.

If the navigation bar is disabled then a standalone
navigation ring is added.

Change-Id: I4d9c2db0ccd801052d1880c3ff29fb2ab2750bc7
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
[2/2] Navigation bar width & height

Change-Id: I6ee0a438bc23ba7883e98ecf6fa494d1ad01fca2
Signed-off-by: kecinzer <kecinzer@gmail.com>
Merge branch 'kitkat' of github.com:AOKP/packages_apps_ROMControl into kitkat