Make sure that multiband processing is active when the residual echo detector is active.

webrtc/modules/audio_processing/audio_processing_impl.cc

Index: webrtc/modules/audio_processing/audio_processing_impl.cc
diff --git a/webrtc/modules/audio_processing/audio_processing_impl.cc b/webrtc/modules/audio_processing/audio_processing_impl.cc
index f63cb206b5c6aaf72a4bc30b47ebd0b6c7c8680b..a88b8566ce28746f743dfe935e53729b3ce7fcdf 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.cc
+++ b/webrtc/modules/audio_processing/audio_processing_impl.cc
@@ -189,9 +189,11 @@ bool AudioProcessingImpl::ApmSubmoduleStates::CaptureMultiBandSubModulesActive()
     const {
 #if WEBRTC_INTELLIGIBILITY_ENHANCER
   return CaptureMultiBandProcessingActive() ||
-         intelligibility_enhancer_enabled_ || voice_activity_detector_enabled_;
+         intelligibility_enhancer_enabled_ ||
+         voice_activity_detector_enabled_ || residual_echo_detector_enabled_;
 #else
-  return CaptureMultiBandProcessingActive() || voice_activity_detector_enabled_;
+  return CaptureMultiBandProcessingActive() ||
+         voice_activity_detector_enabled_ || residual_echo_detector_enabled_;
 #endif
 }
 
@@ -205,7 +207,8 @@ bool AudioProcessingImpl::ApmSubmoduleStates::CaptureMultiBandProcessingActive()
 bool AudioProcessingImpl::ApmSubmoduleStates::RenderMultiBandSubModulesActive()
     const {
   return RenderMultiBandProcessingActive() || echo_canceller_enabled_ ||
-         mobile_echo_controller_enabled_ || adaptive_gain_controller_enabled_;
+         mobile_echo_controller_enabled_ || adaptive_gain_controller_enabled_ ||
+         residual_echo_detector_enabled_;
 }
 
 bool AudioProcessingImpl::ApmSubmoduleStates::RenderMultiBandProcessingActive()