Android improvements:

runtime/embedders/openglui/android/android_sound_handler.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef EMBEDDERS_OPENGLUI_ANDROID_ANDROID_SOUND_HANDLER_H_
 #define EMBEDDERS_OPENGLUI_ANDROID_ANDROID_SOUND_HANDLER_H_
 
 #include <android_native_app_glue.h>
 #include <SLES/OpenSLES.h>
 #include <SLES/OpenSLES_Android.h>
 #include <SLES/OpenSLES_AndroidConfiguration.h>
 #include <vector>
 
 #include "embedders/openglui/common/sample.h"
 #include "embedders/openglui/common/sound_handler.h"
 #include "embedders/openglui/common/types.h"
 
 class AndroidSoundHandler : public SoundHandler {
   public:
     explicit AndroidSoundHandler(android_app* application);
     int32_t Start();
     void Stop();
+    int32_t Pause();
+    int32_t Resume();
 
     int32_t PlayBackground(const char* path);
     void StopBackground();
 
     int32_t PlaySample(const char* path);
 
   private:
     int32_t CreateAudioPlayer(SLEngineItf engine_if,
                               const SLInterfaceID extra_if,
                               SLDataSource data_source,
                               SLDataSink data_sink,
                               SLObjectItf& player_out,
                               SLPlayItf& player_if_out);
 
+    int32_t SetBackgroundPlayerState(int state);
     int32_t StartSamplePlayer();
 
     android_app* application_;
     SLObjectItf engine_;
     SLEngineItf engine_if_;
     SLObjectItf output_mix_;
     SLObjectItf background_player_;
     SLPlayItf background_player_if_;
     SLSeekItf background_player_seek_if_;
     SLObjectItf sample_player_;
     SLPlayItf sample_player_if_;
     SLBufferQueueItf sample_player_queue_;
 };
 
 #endif  // EMBEDDERS_OPENGLUI_ANDROID_ANDROID_SOUND_HANDLER_H_