alsa_sound: call voice volume api for direct output also

- Voip volume is not applied on direct output and as a result
  volume cannot be adjusted for some voicemail applications
  which opens direct output stream with mode set to IN_CALL
- Voice volume is applied only for primary output and volume
  command is not sent to HAL for direct output
- Call voice volume api for direct output as well from policy
  manager

Change-Id: Ib40a9714230c45b0a51c67be4a056109d256008c