AEC dump `Stream::level` renamed

Making it clear that the field is used to store the applied input
volume and not the recommended input volume.

Bug: webrtc:7494, b/241923537
Change-Id: Ib91bc1a12348f63e3a4ba6e068ed02e40786a87b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/271342
Reviewed-by: Jesus de Vicente Pena <devicentepena@webrtc.org>
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38051}
diff --git a/modules/audio_processing/debug.proto b/modules/audio_processing/debug.proto
index 4bc1a52..cc5efbc 100644
--- a/modules/audio_processing/debug.proto
+++ b/modules/audio_processing/debug.proto
@@ -35,7 +35,7 @@
 
   optional int32 delay = 3;
   optional sint32 drift = 4;
-  optional int32 level = 5;
+  optional int32 applied_input_volume = 5;
   optional bool keypress = 6;
 
   // float deinterleaved data, where each repeated element points to a single