libaudiohal: Factorize more between version

Use macro in include to avoid duplicating all the headers.
That will be useful when a third version is added.

Bug: 118203066
Test: compile
Change-Id: I8972b9ac9d098b32c9e7de48ff0544440c29adbf
Signed-off-by: Kevin Rocard <krocard@google.com>