Don't recreate the speech encoder if we don't have to

webrtc/modules/audio_coding/codecs/red/audio_encoder_copy_red.h

Index: webrtc/modules/audio_coding/codecs/red/audio_encoder_copy_red.h
diff --git a/webrtc/modules/audio_coding/codecs/red/audio_encoder_copy_red.h b/webrtc/modules/audio_coding/codecs/red/audio_encoder_copy_red.h
index ead9fd65a21f6b06226db3120bbbd32367efb034..a08118364cc44b591060b3521684ec91c0d0246e 100644
--- a/webrtc/modules/audio_coding/codecs/red/audio_encoder_copy_red.h
+++ b/webrtc/modules/audio_coding/codecs/red/audio_encoder_copy_red.h
@@ -51,6 +51,8 @@ class AudioEncoderCopyRed final : public AudioEncoder {
   void SetMaxPlaybackRate(int frequency_hz) override;
   void SetProjectedPacketLossRate(double fraction) override;
   void SetTargetBitrate(int target_bps) override;
+  rtc::ArrayView<std::unique_ptr<AudioEncoder>> ReclaimContainedEncoders()
+      override;
 
  protected:
   EncodedInfo EncodeImpl(uint32_t rtp_timestamp,