Introduce PC level audio quality test.

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}
diff --git a/audio/BUILD.gn b/audio/BUILD.gn
index ff38da0..4a3d8fd 100644
--- a/audio/BUILD.gn
+++ b/audio/BUILD.gn
@@ -177,18 +177,27 @@
 
       sources = [
         "test/low_bandwidth_audio_test.cc",
+        "test/pc_low_bandwidth_audio_test.cc",
       ]
 
       deps = [
         ":audio_end_to_end_test",
+        "../api:create_network_emulation_manager",
+        "../api:create_peerconnection_quality_test_fixture",
+        "../api:network_emulation_manager_api",
+        "../api:peer_connection_quality_test_fixture_api",
         "../api:simulated_network_api",
+        "../call:simulated_network",
         "../common_audio",
         "../rtc_base:rtc_base_approved",
         "../system_wrappers",
         "../test:fileutils",
         "../test:test_common",
         "../test:test_main",
+        "../test:test_support",
+        "../test/pc/e2e:network_quality_metrics_reporter",
         "//testing/gtest",
+        "//third_party/abseil-cpp/absl/memory:memory",
       ]
       if (is_android) {
         deps += [ "//testing/android/native_test:native_test_native_code" ]