Revert "Audio HAL wrappers"

This reverts commit f732d360a1f3670bb26f44b6f7c714de4c6fe753.
Revert "nvaudio_conf.xml: cleanup indentation"

This reverts commit 87462b01114fa75ba13dcef2b5dcfe68c5be0d2e.
Revert "audio_policy.conf: remote_submix can handle 44100"

This reverts commit 2641b5dbe07e1bba80df02d56b1e81a70f70c403.