[voicecall] Read the EFECC also if SIM goes straigth to READY

It is possible that ofono starts so that SIM is already in
in READY state when voicecall gets the information. In that case
without this fix core never asks the emergency numbers

Signed-off-by: Jussi Kangas <jussi.kangas@oss.tieto.com>
Merge pull request #167 from jkangas/next

Request for pulling EFECC reading when READY to main branch