Audio V4: Add V4 common utils

Bug: 38184704
Test: compile
Change-Id: I935fe4343ab517f7a8dc65e1b9720097a3ab34da
Merged-In: I935fe4343ab517f7a8dc65e1b9720097a3ab34da
Cherry-picked from master
Signed-off-by: Kevin Rocard <krocard@google.com>
3 files changed