Don't forget to support G722 stereo decoding

webrtc/modules/audio_coding/codecs/g722/audio_decoder_g722.h

Index: webrtc/modules/audio_coding/codecs/g722/audio_decoder_g722.h
diff --git a/webrtc/modules/audio_coding/codecs/g722/audio_decoder_g722.h b/webrtc/modules/audio_coding/codecs/g722/audio_decoder_g722.h
index ab104f2e20ce2953fd3dda535024412c57869943..0a530190fee9ce6afa98546cd1016053d3a2b72f 100644
--- a/webrtc/modules/audio_coding/codecs/g722/audio_decoder_g722.h
+++ b/webrtc/modules/audio_coding/codecs/g722/audio_decoder_g722.h
@@ -42,10 +42,10 @@ class AudioDecoderG722Impl final : public AudioDecoder {
   RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderG722Impl);
 };
 
-class AudioDecoderG722Stereo final : public AudioDecoder {
+class AudioDecoderG722StereoImpl final : public AudioDecoder {
  public:
-  AudioDecoderG722Stereo();
-  ~AudioDecoderG722Stereo() override;
+  AudioDecoderG722StereoImpl();
+  ~AudioDecoderG722StereoImpl() override;
   void Reset() override;
   std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload,
                                         uint32_t timestamp) override;
@@ -71,7 +71,7 @@ class AudioDecoderG722Stereo final : public AudioDecoder {
 
   G722DecInst* dec_state_left_;
   G722DecInst* dec_state_right_;
-  RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderG722Stereo);
+  RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderG722StereoImpl);
 };
 
 }  // namespace webrtc