Revert "AudioService: fix safe volume enforced even when disabled"

This reverts commit 7d222f00b47396e18c63c7203c0c796f39f5fbff.

Change-Id: I66b15ec23dd6538bf3cb419262f4a89d73ccb3dd
Merge "Revert "AudioService: fix safe volume enforced even when disabled"" into kitkat