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

This reverts commit e8c86427875193d9449dc3410f159ea6a7886a35.
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