hal: move audio specific config files to HAL

-Move all audio specific config files from device/qcom/msm8xxx
to hardware/qcom/audio/configs/msm8xxx folder for
msm8992 and msm8994 targets.
-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.

Change-Id: I8a54672baa428d36492db8dd0fdfed8b1cb4a10d