audio: change mute/volume controls for using soft control api

Volume and Mute controls are changed to use specific session and
soft control api. So, HAL also changed to use new api.

bug: 10023401
Change-Id: I686d8495293242097817d870477f59ed154a6b31
Signed-off-by: hyunsub.na <hyunsub.na@lge.com>
Signed-off-by: Sungmin Choi <sungmin.choi@lge.com>
Signed-off-by: sangwoo <sangwoo2.park@lge.com>