Base: On-The-Go: Overlay status- and navigation bar as well

Change-Id: I067981028340cdd53fe112cae9b7a4ddcb7532a8
Base: On-The-Go: Change the way of changing the camera mode

changing it on the fly is too buggy like i have done it.
sometimes things fail and we are getting stuck ;P

on mode change, save the value, create a notification and stop the service.
the notification allows to restart the service.

Change-Id: Ie02f01a4ab2f856cd58fe5fde8c49220bf7efd4b

Conflicts:

	packages/SystemUI/res/values/custom_strings.xml
	packages/SystemUI/src/com/android/systemui/nameless/onthego/OnTheGoService.java