Revert "Add (virtual) device ID to AudioPolicy/AudioMix"

This reverts commit 95b405a5.

Reason for revert: <Potential culprit for b/330267352  - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.>

Change-Id: I1661ebf8dbf58c781021299901d267705845ac6b