Move media/audio files into media namespace

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 81264b51d511602f1b9d12fcd53f39b326ad56cb..479549b68b559021dda422100b5052094f202114 100644
--- a/media/audio/android/audio_manager_android.cc
+++ b/media/audio/android/audio_manager_android.cc
@@ -9,6 +9,8 @@
 #include "media/audio/audio_manager.h"
 #include "media/audio/fake_audio_input_stream.h"
 
+namespace media {
+
 // Maximum number of output streams that can be open simultaneously.
 static const int kMaxOutputStreams = 10;
 
@@ -63,3 +65,5 @@ AudioInputStream* AudioManagerAndroid::MakeLowLatencyInputStream(
   DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format);
   return FakeAudioInputStream::MakeFakeStream(this, params);
 }
+
+}  // namespace media