Revert "Refactor AudioTrack callback to Interface"

This reverts commit f86d269d7cd4141129d2f4b18035e133324c15b7.

Reason for revert: Bug: 204055298

Change-Id: Ib48e22cce572845192f1a9bc4b2c70c4816fbe5a
(cherry picked from commit f13b98aac7921d6ef707940daf82cc4334f5e790)
3 files changed