ACM/NetEq: Restructure how post-decode VAD is enabled

webrtc/modules/audio_coding/neteq/neteq.cc

Index: webrtc/modules/audio_coding/neteq/neteq.cc
diff --git a/webrtc/modules/audio_coding/neteq/neteq.cc b/webrtc/modules/audio_coding/neteq/neteq.cc
index ca51c9602d73b59339902ee12568aa611e93f09f..c31dbdc1a3c1920aaed7a5308af25eb6da122f92 100644
--- a/webrtc/modules/audio_coding/neteq/neteq.cc
+++ b/webrtc/modules/audio_coding/neteq/neteq.cc
@@ -32,6 +32,8 @@ std::string NetEq::Config::ToString() const {
   std::stringstream ss;
   ss << "sample_rate_hz=" << sample_rate_hz << ", enable_audio_classifier="
      << (enable_audio_classifier ? "true" : "false")
+     << ", enable_post_decode_vad="
+     << (enable_post_decode_vad ? "true" : "false")
      << ", max_packets_in_buffer=" << max_packets_in_buffer
      << ", background_noise_mode=" << background_noise_mode
      << ", playout_mode=" << playout_mode