[IPC-SND] Sound senders prototypes.
Added basic senders for ril_request_set_mute, srs_snd_set_call_volume and srs_snd_set_call_audio_path

Change-Id: Ice32b6f05a7a5d8a2c11971015d245d2af31c3cf
[AUDIO] Modifications to work with Wave'ish sound layer.
Merge branch 'experimental' of ssh://github.com/KB-JetDroid/bada-modemril into sound
fixup! Merge branch 'experimental' of ssh://github.com/KB-JetDroid/bada-modemril into sound
Merge branch 'experimental' of ssh://github.com/KB-JetDroid/bada-modemril into sound