Only use paced packets for estimating bitrate probes.

webrtc/video/audio_receive_stream.cc

Index: webrtc/video/audio_receive_stream.cc
diff --git a/webrtc/video/audio_receive_stream.cc b/webrtc/video/audio_receive_stream.cc
index f5383f43196231985077960c6e4ad4d34fec428d..332d95b9032453b9a5d16b61fb85db9e2c0c2eaf 100644
--- a/webrtc/video/audio_receive_stream.cc
+++ b/webrtc/video/audio_receive_stream.cc
@@ -83,7 +83,7 @@ bool AudioReceiveStream::DeliverRtp(const uint8_t* packet, size_t length) {
     int64_t arrival_time_ms = TickTime::MillisecondTimestamp();
     size_t payload_size = length - header.headerLength;
     remote_bitrate_estimator_->IncomingPacket(arrival_time_ms, payload_size,
-                                              header);
+                                              header, false);
   }
   return true;
 }