Revert "Improve portability of <system/audio.h> to non-Android platforms"

This reverts commit a5dfd03383420c06fc05e667eb1dfd1e2842300f.

Reason for revert: broke build

Change-Id: Ib9a629ccafd0f871cebe15ddad2c0c9dce0c62b7
3 files changed