Merge changes Iab4d397d,Ie38dd261,Ibec647f1,I5f5cbb59,I01c0c867

* changes:
  soundtrigger: Add VTS tests for v2.1
  soundtrigger: Default implementation for version 2.1
  soundtrigger: Refactor the default implementation to be extensible
  soundtrigger: Apply clang-format to 2.0 default implementation
  soundtrigger: Define v2.1 HAL