audio: Centralize audio configuration paths specification

The list of possible paths for the audio configuration
files is now retrieved using audio_get_configuration_paths()
function. All duplicated lists of known configuration
directories have been removed.

Bug: 153680356
Test: test audio on built image working
      atest VtsHalAudioV5_0TargetTest VtsHalAudioPolicyV1_0TargetTest
Change-Id: I8c369442f5ca7baa17df95e6a001396fc9de5681