audio.h: Fix a warning

same issue exists in libhardware fix it here xD
audio: Update Listen HAL API for MultiSession.

- Updated the open_listen_session API to pass
listen_open_params.
- listen_open_params will be used to decide whether to open
CDSP or ADSP session.

Change-Id: If797c58f99e877384f46f1f3a504dacf20ae45d1
(cherry picked from commit 652e1a52cf3dde8c692cf2483f5a1c9926cf6e35)