Added further tuning of AEC3

webrtc/modules/audio_processing/aec3/residual_echo_estimator.cc

Index: webrtc/modules/audio_processing/aec3/residual_echo_estimator.cc
diff --git a/webrtc/modules/audio_processing/aec3/residual_echo_estimator.cc b/webrtc/modules/audio_processing/aec3/residual_echo_estimator.cc
index 18a07b2f5a158eb1b649e3f549e5d4da6fd93d2b..45d3a5f79b48448289a1b38f77dd016129e0db6f 100644
--- a/webrtc/modules/audio_processing/aec3/residual_echo_estimator.cc
+++ b/webrtc/modules/audio_processing/aec3/residual_echo_estimator.cc
@@ -29,7 +29,7 @@ void InfiniteErlPowerEstimate(
     size_t blocks_since_last_saturation,
     const std::array<float, kFftLengthBy2Plus1>& S2_fallback,
     std::array<float, kFftLengthBy2Plus1>* R2) {
-  if (active_render_blocks > 5 * 250) {
+  if (active_render_blocks > 20 * 250) {
     // After an amount of active render samples for which an echo should have
     // been detected in the capture signal if the ERL was not infinite, set the
     // residual echo to 0.