audiopolicy: Fix for isStateInCall() do not return proper status

After call disconnected, there is an incoming call again. The
isStateInCall() will return IN_CALL status even the phone is
in RINGTONE status.

This is happening due to incorrect call status select logic in APM.

Fix this by ensuring IN_CALL status selection only when audio mode is
AUDIO_MODE_IN_CALL or AUDIO_MODE_IN_COMMUNICATION.

CRs-Fixed: 855041
Change-Id: I318d098bf1727bd3d9073df9dc163f96e8de7b97