audio: Add presubmit tests for APM

Hook up audiopolicy_tests and systemaudio_tests as presubmit tests.
These tests are native C++Unit tests, it takes a couple of millisec
to run them.

Bug: 122855449
Test: cd frameworks/av/services/audiopolicy && atest
Change-Id: I7abfeb81472ff2a2610948aa514eb506bed7546b