Revert^4 "Customize StubVolume implementation for ARC"

This reverts commit 8ed81fd9.

Reason for revert: Let me try one last time more carefully. According to https://googleplex-android-review.git.corp.google.com/q/%2522customize+stubvolume%2522 - this CL will flow to aosp branches (without vendor images) and 2 branches with vendor images. I have submitted the vendor CL for both branches now (ag/13366009 and ag/13371672). This should not break anything now.

Change-Id: I69aacceabfb70053387a3c156b49e06be65fe6e4