Update to current webrtc library

This is from the upstream library commit id
3326535126e435f1ba647885ce43a8f0f3d317eb, corresponding to Chromium
88.0.4290.1.

webrtc/modules/audio_processing/ns/suppression_params.cc

@@ -0,0 +1,49 @@
+/*
+ *  Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "modules/audio_processing/ns/suppression_params.h"
+
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+
+SuppressionParams::SuppressionParams(
+    NsConfig::SuppressionLevel suppression_level) {
+  switch (suppression_level) {
+    case NsConfig::SuppressionLevel::k6dB:
+      over_subtraction_factor = 1.f;
+      // 6 dB attenuation.
+      minimum_attenuating_gain = 0.5f;
+      use_attenuation_adjustment = false;
+      break;
+    case NsConfig::SuppressionLevel::k12dB:
+      over_subtraction_factor = 1.f;
+      // 12 dB attenuation.
+      minimum_attenuating_gain = 0.25f;
+      use_attenuation_adjustment = true;
+      break;
+    case NsConfig::SuppressionLevel::k18dB:
+      over_subtraction_factor = 1.1f;
+      // 18 dB attenuation.
+      minimum_attenuating_gain = 0.125f;
+      use_attenuation_adjustment = true;
+      break;
+    case NsConfig::SuppressionLevel::k21dB:
+      over_subtraction_factor = 1.25f;
+      // 20.9 dB attenuation.
+      minimum_attenuating_gain = 0.09f;
+      use_attenuation_adjustment = true;
+      break;
+    default:
+      RTC_NOTREACHED();
+  }
+}
+
+}  // namespace webrtc