Audio V4: Move service entry point to common

The HAL audio service entry point is not version dependant
and is common to core and effect.

Bug: 38184704
Test: compile
Change-Id: I143cf28490afc978791ccd7e8aeee2106cbb2ebd
Merged-In: I143cf28490afc978791ccd7e8aeee2106cbb2ebd
Cherry-picked from master
Signed-off-by: Kevin Rocard <krocard@google.com>
3 files changed