Remove DU about app preference if user removes it from system/app

Same as OmniSwitch, users remove shit then wonder why shit FCs.....

This keeps us in the clear and don't have to worry about shit like this

Change-Id: Ib81a1262b7570dfd882d18bf917788f0e6fa3da1
Settings: Add translatable=false to some values. In this way, TTools does not define them as untranslated

Change-Id: I52fcefd21a3ab85ac8d7186a9cc4211e5deeedf4