This fixes errors like this:

* E APM::Serializer: deserialize: Could not parse /odm/etc/audio_policy_configuration.xml document.

* E APM::AudioPolicyEngine/Config: parse: Could not parse document /vendor/etc/audio_policy_engine_configuration.xml

Change-Id: Ic50db0d6e749f3f397116ce1fb145956bac7fc56