Add center clock (2/2)

Change-Id: I4b7faba56ef44941147d36e9e252cb14860667de

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

Conflicts:
	res/values-ko/cm_strings.xml
	res/values/cm_strings.xml
	res/xml/status_bar.xml