Broadcast icc card state as NOT_READY if card is not initialized

When radio turns on, card state (external state ) is updated.
At this point, if the UiccCard instance is null (UiccCard instance could
be null at bootup, before we have received a vaild card state from
UiccController), icc state as ABSENT is broadcasted.

When the card state is being updated, if the UiccCard instance
is null, broadcast the state as NOT_READY instead of ABSENT.

Change-Id: I18ced764a43f77b2df01a09891ef6356d7ac7ed2