hal: update in_call state to false when call stopped

Sometimes the mode of HAL may be not in AUDIO_MODE_NORMAL while
active call stopped, then it will return with incorrect call state
to APM.

Update the state to false regardless of the HAL mode when active
call stopped.

Change-Id: I8b1c356f65ec273802cda282b1500a3859e837ce
CRs-Fixed: 899756