Pass time constant to bwe smoothing filter.

webrtc/test/fuzzers/congestion_controller_feedback_fuzzer.cc

Index: webrtc/test/fuzzers/congestion_controller_feedback_fuzzer.cc
diff --git a/webrtc/test/fuzzers/congestion_controller_feedback_fuzzer.cc b/webrtc/test/fuzzers/congestion_controller_feedback_fuzzer.cc
index 496af90c6995783cb9211519c31cfa9e31c04144..6d5deab2cd509962a57d2c8cac8e04cf7ed65c62 100644
--- a/webrtc/test/fuzzers/congestion_controller_feedback_fuzzer.cc
+++ b/webrtc/test/fuzzers/congestion_controller_feedback_fuzzer.cc
@@ -21,7 +21,8 @@ class NullBitrateObserver : public CongestionController::Observer,
   ~NullBitrateObserver() override {}
   void OnNetworkChanged(uint32_t bitrate_bps,
                         uint8_t fraction_loss,
-                        int64_t rtt_ms) override {}
+                        int64_t rtt_ms,
+                        int64_t probing_interval_ms) override {}
   void OnReceiveBitrateChanged(const std::vector<uint32_t>& ssrcs,
                                uint32_t bitrate) override {}
 };