Refactor audio aconfig flags

- Rename/repackage MIDI, AudioPolicy, Audioserver flags
- Add flag libraries not included in framework as static libs within
  system server
- Remove direct module dependencies in framework in favor of filegroup

Test: Compiles
Bug: 308062714
Change-Id: I45546b67a5a4214680e98ba789aabe33b0a30439
12 files changed