Add PC level audio quality test as separate file but into the same binary as low_bandwidth_audio_test.cc Bug: webrtc:10138 Change-Id: I3bb7df4130ab62c21a82881cd9f57b936f3cc11d Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/144621 Reviewed-by: Minyue Li <minyue@webrtc.org> Reviewed-by: Oskar Sundbom <ossu@webrtc.org> Commit-Queue: Artem Titov <titovartem@webrtc.org> Cr-Commit-Position: refs/heads/master@{#28493}