Add ability to dump the coarse filter in the echo subtractor

Bug: b/155316201
Change-Id: I008cdf1531af3c3c0fff4ce19ad5dd74f8e73f65
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/217891
Reviewed-by: Sam Zackrisson <saza@google.com>
Commit-Queue: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34047}

modules/audio_processing/logging/apm_data_dumper.h

@@ -65,6 +65,15 @@ class ApmDataDumper {
 #endif
   }
 
+  // Returns whether dumping functionality is enabled/available.
+  static bool IsAvailable() {
+#if WEBRTC_APM_DEBUG_DUMP == 1
+    return true;
+#else
+    return false;
+#endif
+  }
+
   // Default dump set.
   static constexpr size_t kDefaultDumpSet = 0;