Do not update External state until we receive card status.

When updateExternalState is called before card state is received
from RIL, unwanted ABSENT state is getting broadcasted to
external apps incase of property apm_sim_not_pwdn is  set to 1.

So do not broadcast card state to external apps until we
receive card status from RIL atlease once.

CRs-Fixed: 520485
Change-Id: I8803360dd57055ca3534b6dc7bade63ff629c730