alsa_sound: Maintain separate mute states for each call type.

   Mute is not proapagated to CS call session during
   SRVCC handover.

   This is due to mute state is not updated to CS call
   session when SRVCC handover happens.

   Fix is to maintain different mute states to different
   call types, so that mute state will be updated on
   each call type independently.

   CRs-Fixed: 516986

Change-Id: I88a589ce74bba3e4018e0455f0008b5f1cb002e8
audio-caf: snd_use_case_apply_voice_acdb: initialise current_mod[]

Change-Id: I38fd1638e34f38e97e9e48a0ddf51bb31e3b10f8