audio: HAL V7 tweaks

- rename AudioBasicConfig -> AudioConfigBase to better
  match a similar structure in audio.h;

- define AudioProfile structure for defining an I/O profile;

- use AudioProfile to replace IStream.getSupported* methods
  with a single IStream.getSupportedProfiles method;

- define AudioDevice type for convenience and clarity;

- move enums definition for AudioInputFlags and AudioOutputFlags
  into XSD. This allows parsing APM config w/o depending on
  the framework code.

Bug: 142480271
Test: m
Change-Id: I1951b2de383751fe53b96954dfd02cdd1ab6cc8f
Merged-In: I1951b2de383751fe53b96954dfd02cdd1ab6cc8f