Audio V4: Declare support for 4.0 interface

Declare that the audio HAL service supports 4.0 as well as 2.0
interface.
Formatting done by clang-format.

Test: compile
Bug: 38184704
Change-Id: Iee842b141e1218f4f3779187339bde40680ec78a
Merged-In: Iee842b141e1218f4f3779187339bde40680ec78a
Cherry-picked from master
Signed-off-by: Kevin Rocard <krocard@google.com>