hal: fix in_call flag is not reset after voice call stop

In voip+voice concurrency case, if voip resume after voice call stop,
then only MODE_IN_COMM instead of MODE_NORMAl and MODE_INCOMM is set.
In this case, in_call flag is not reset.

Fix it to reset in_call flag if call state has been set to inactive
when MODE_IN_COMM is set for voip call. 

Change-Id: Idac32a8bafa73b9bd2f885394117457e8d6edfa9