Stop using old AudioCodingModule::RegisterReceiveCodec overloads

BUG=webrtc:5801

Review-Url: https://codereview.webrtc.org/2388153004
Cr-Commit-Position: refs/heads/master@{#14753}
diff --git a/webrtc/modules/audio_coding/audio_coding.gypi b/webrtc/modules/audio_coding/audio_coding.gypi
index 5f9eb2c..a9b9e20 100644
--- a/webrtc/modules/audio_coding/audio_coding.gypi
+++ b/webrtc/modules/audio_coding/audio_coding.gypi
@@ -87,6 +87,8 @@
         'codecs/audio_decoder_factory.h',
         'codecs/audio_format.cc',
         'codecs/audio_format.h',
+        'codecs/audio_format_conversion.cc',
+        'codecs/audio_format_conversion.h',
       ],
     },
     {