Revert "Settings: Make Safe headset volume handling user configurable (2 of 2)"

This reverts commit 05a93fd955c2f0f95942364a5f4c652635d2dd79.
Settings: Make Safe headset volume handling user configurable (2 of 2)

Patch set 1  : Initial commit
Patch set 2  : Code cleanup and dedupe

Change-Id: I9d46ba5b8ca5a8b18dcb4856c348c86bc3e70899