Update phoneState to IDLE on SRVCC complete indication

When an Emergency call is placed, DUT is displaying Cellular Data option
in disabled state even after exiting from ECBM mode

-Emergency call was placed over IMS and then transferred to CS
-Phone notifier notifies call state as OFFHOOK, because IMS call state
was not updated to IDLE after SRVCC complete

Change-Id: I5d605d47adc6aff4aa16b28732d2b254023f3610
CRs-Fixed: 822705