Pass time constanct to bwe smoothing filter.

BUG=webrtc:6443, webrtc:6303

Review-Url: https://codereview.webrtc.org/2518923003
Cr-Commit-Position: refs/heads/master@{#15266}
diff --git a/webrtc/voice_engine/voe_codec_impl.cc b/webrtc/voice_engine/voe_codec_impl.cc
index 8ac24da..b2fd08d 100644
--- a/webrtc/voice_engine/voe_codec_impl.cc
+++ b/webrtc/voice_engine/voe_codec_impl.cc
@@ -137,8 +137,9 @@
     _shared->SetLastError(VE_NOT_INITED, kTraceError);
     return -1;
   }
+  constexpr int64_t kDefaultProbingIntervalMs = 3000;
   _shared->channel_manager().GetChannel(channel).channel()->SetBitRate(
-      bitrate_bps);
+      bitrate_bps, kDefaultProbingIntervalMs);
   return 0;
 }