Make post-processor update messages less spammy.

Bug: b/69387812
Test: build & run
Change-Id: Ibb30cf0ebcdea39c9087c6730ddeb4dc549c1c4a
Reviewed-on: https://chromium-review.googlesource.com/780451Reviewed-by: Kenneth MacKay <kmackay@chromium.org>
Commit-Queue: Benjamin Shaya <bshaya@google.com>
Cr-Commit-Position: refs/heads/master@{#523840}

chromecast/media/cma/backend/post_processing_pipeline_impl.cc

@@ -154,8 +154,8 @@ void PostProcessingPipelineImpl::SetPostProcessorConfig(
               [&name](PostProcessorInfo& p) { return p.name == name; });
   if (it != processors_.end()) {
     it->ptr->UpdateParameters(config);
-    LOG(INFO) << "Config string: " << config
-              << " was delivered to postprocessor " << name;
+    VLOG(1) << "Config string: " << config << " was delivered to postprocessor "
+            << name;
   }
 }