jf: Add USB speaker device to audio usecases

 * USB speaker needs help from the AFE proxy.

Change-Id: I1c828e7ad3f56a532ee0fc660e478b96095ea192
jf: Remove useless copy of audio_effects.conf

Change-Id: I36a9d82c9c722ffa986b04e1e57114d0c9c5fe19