libaudiohal: Introduce support HAL V5 identical to V4

The V5 HAL is identical to V4 for now.
Difference will be added in followup patches.

Bug: 118203066
Test: compile
Change-Id: I3db5d62cc2412766d8d0a78dab57455236a5019e
Signed-off-by: Kevin Rocard <krocard@google.com>