audio: configs: add target specific audio policy configuration XML

Add target specific audio policy configuration XML file for all targets
with enhancements such as additional formats under compressed_offload
output, new device ports such as proxy, line, fm etc., new outputs like
direct_pcm, raw etc. as per the text based audio_policy.conf file and
enable its usage by setting the flag USE_XML_AUDIO_POLICY_CONF to 1.

CRs-Fixed: 1015136
Change-Id: Ifcaa780e0f47df74e1476bb2dc0584bd54f0206b