system/core: New stream type and flag for incall music delivery

- Add new stream type and flag for incall music delivery

Change-Id: I54d0d820d2dbb888d2e0cebdca63be2856eb00d8
system/core: Add tunnel format frame size

Add tunnel mode formats frame sizes to audio.h. This ensures frame
size definition in one place.

Change-Id: Ia01cb4cba003e538a53aaa18330ef860367859c1
audio: Add support tunnel mode recording

Support for tunnel recording

Change-Id: I8e4a4ce4cde23296beb783c7d678db1fa8936af1