OmniGears: added missing persistent=false

settings that are stored in Settings dont need to
be made persistent again in the settings storage
and should use android:persistent=false

This will also make it possible to change
the type of a settings without interference
with the settings storage breaking upgrades

Change-Id: I3af444abd43fbac7465e6fa6c033de3da7a09daa
merge changes from Omni 4.4 into local branch

Conflicts:
	res/xml/bars_settings.xml
	res/xml/more_interface_settings.xml

Change-Id: I9334a4926f58c67cdf3039f62cb2e4812fcbc014