message: Add UMA counter for audio interruptions
  The metric is added to Chromium histograms in
  Cr-Commit-Position: refs/heads/master@{#29854}
diff: @@ -193,6 +193,8 @@ void StatisticsCalculator::EndExpandEvent(int fs_hz) {
  if (event_duration_ms >= kInterruptionLenMs && decoded_output_played_) {
  lifetime_stats_.interruption_count++;
  lifetime_stats_.total_interruption_duration_ms += event_duration_ms;
  + RTC_HISTOGRAM_COUNTS("WebRTC.Audio.AudioInterruptionMs", event_duration_ms,
  + /*min=*/150, /*max=*/5000, /*bucket_count=*/50);
  }
  concealed_samples_at_event_end_ = lifetime_stats_.concealed_samples;
  }
  