Device enumeration on Android now thread safe

media/audio/android/audio_manager_android.cc

Index: media/audio/android/audio_manager_android.cc
diff --git a/media/audio/android/audio_manager_android.cc b/media/audio/android/audio_manager_android.cc
index 34665103b2856c9ac7917a86f136c9c221189693..c6d046737c931ef4499f174597863c282e88b6a1 100644
--- a/media/audio/android/audio_manager_android.cc
+++ b/media/audio/android/audio_manager_android.cc
@@ -163,6 +163,9 @@ AudioOutputStream* AudioManagerAndroid::MakeLowLatencyOutputStream(
 
 AudioInputStream* AudioManagerAndroid::MakeLinearInputStream(
     const AudioParameters& params, const std::string& device_id) {
+  // TODO(henrika): add support for device selection if/when any client
+  // needs it.
+  DLOG_IF(ERROR, !device_id.empty()) << "Not implemented!";
   DCHECK_EQ(AudioParameters::AUDIO_PCM_LINEAR, params.format());
   return new OpenSLESInputStream(this, params);
 }