Telephony: Always create IccCard

There is some bug in master branch which is not in AOSP code
that prevents KeyGuard from showing up unless IccCard broadcasts
its status

Force creation of IccCard (even if it really is absent) so that
it broadcasts its state and KeyGuard gets displayed

Fix NullPointerException in case card was removed by checking
return value of phone.getIccCard()

bug: 6983013
Change-Id: I95de1cc8a70a9e3d66d3e5d6059e82626057c5d4