FP5: Set ro.media.xml_variant.profiles to choose media profiles

This was introduced with [1] and allows to choose target specific media
profiles without caf changes to frameworks/av. Unset media.settings.xml
so that the new property gets respected and drop copying the lahaina
config as media_profiles_vendor since we don't need a fallback anymore.

[1]: https://github.com/LineageOS/android_frameworks_av/commit/eaac82f33f2a064c6ae1a5f1791bb13669820687#

Change-Id: I7ec306bf3dd595c09308ed26c9d3a6db8490c7f0