Audio HAL V4: Switch back to 32 bit AudioDevice

Switching to 64 bit has proven to be too much refactor
and the need is not immediate.

Instead in the next version of the Audio HAL,
AudioDevice will no longer be a bitfield and when multiple
devices will need to be passed, a list will be used.

Bug: 38184704
Test: mm
Change-Id: I8de14fc4ee69fb70fc1c4275b568093a5d0aec1b
Signed-off-by: Kevin Rocard <krocard@google.com>