Conversational Speech tool, MultiEndCall class and unit tests via mocking

webrtc/modules/audio_processing/test/conversational_speech/BUILD.gn

Index: webrtc/modules/audio_processing/test/conversational_speech/BUILD.gn
diff --git a/webrtc/modules/audio_processing/test/conversational_speech/BUILD.gn b/webrtc/modules/audio_processing/test/conversational_speech/BUILD.gn
index 4375c4efb35fb76d2bf2d63b6ee72ea7b2255947..441b1883a7671c5335d7cefdaf7b2cf7ef7c74d1 100644
--- a/webrtc/modules/audio_processing/test/conversational_speech/BUILD.gn
+++ b/webrtc/modules/audio_processing/test/conversational_speech/BUILD.gn
@@ -33,11 +33,20 @@ rtc_static_library("lib") {
   sources = [
     "config.cc",
     "config.h",
+    "multiend_call.cc",
+    "multiend_call.h",
     "timing.cc",
     "timing.h",
+    "wavreader_abstract_factory.h",
+    "wavreader_adaptor.cc",
+    "wavreader_adaptor.h",
+    "wavreader_factory.cc",
+    "wavreader_factory.h",
+    "wavreader_interface.h",
   ]
   deps = [
     "//webrtc/base:rtc_base_approved",
+    "//webrtc/common_audio",
   ]
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
 }
@@ -46,6 +55,9 @@ rtc_source_set("unittest") {
   testonly = true
   sources = [
     "generator_unittest.cc",
+    "mock_wavreader.h",
+    "mock_wavreader_factory.cc",
+    "mock_wavreader_factory.h",
   ]
   deps = [
     ":lib",