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/vad/pitch_internal.cc

@@ -8,10 +8,12 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "webrtc/modules/audio_processing/vad/pitch_internal.h"
+#include "modules/audio_processing/vad/pitch_internal.h"
 
 #include <cmath>
 
+namespace webrtc {
+
 // A 4-to-3 linear interpolation.
 // The interpolation constants are derived as following:
 // Input pitch parameters are updated every 7.5 ms. Within a 30-ms interval
@@ -49,3 +51,5 @@ void GetSubframesPitchParameters(int sampling_rate_hz,
     pitch_lag_hz[n] = (sampling_rate_hz) / (pitch_lag_hz[n]);
   }
 }
+
+}  // namespace webrtc