hal: fix Rx path mute issue during incall recording

When MULTI_VOICE_SESSIONS feature flag is not enabled, the state of
incall recording stream is returned incorrectly. Fix the issue by
moving the corresponding piece of code from voice_extn.c to voice.c.

Change-Id: Id350bad65d12a4f165e80ee11cda3a8f342d38ee
3 files changed