Revert "Settings: safe headset volume option (2 of 2)"

It's hardcoded right now

This reverts commit d53832e23516226bcfbb2e173a866331421c7edb.

Conflicts:
	res/values/pa_strings.xml
	src/com/android/settings/SoundSettings.java
Merge remote-tracking branch 'settings/kitkat-remix' into remix-legacy