Disable ticker preference [2/2]

Ticker can be annoying when you're getting spammed by an angry girlfriend
and various other girls at the same time.  Lets disable it until the problem
just goes away :D

Conflicts:
	res/values/mahdi_strings.xml
	res/xml/status_bar.xml

Change-Id: I76b1759c67d7a81144c9888184af3d76737d7c28