StatusBar: Fix ArrayIndexOutOfBoundsException when updating icons

Arrays for data activity defined in arrays.xml included four items:
in, out, inout and default. While data activity valumes defined in
TelephonyManager is none, in, out, inout and dormant. When trying to
get icons for dormant, there will be ArrayIndexOutOfBoundsException.

Add an item for dormant case in arrays.xml.

CRs-Fixed: 629450

Change-Id: I46b494027335953dd63f27974ecea0d1cfac430b