Use static libaudiofoundation in VTS.

As libaudiofoundation is not part of VNDK, it may break VTS. Using it as a
static library can help solve the problem.

Test: make, atest VtsHalAudioV5_0Target
Bug: 142683018
Change-Id: Id540c354c90bd95681e2506abe47588311c94b67
1 file changed