Backport some work from sample to embedder:

runtime/embedders/android/sound_service.h

Index: runtime/embedders/android/sound_service.h
===================================================================
--- runtime/embedders/android/sound_service.h	(revision 16869)
+++ runtime/embedders/android/sound_service.h	(working copy)
@@ -9,6 +9,8 @@
 #include <SLES/OpenSLES.h>
 #include <SLES/OpenSLES_Android.h>
 #include <SLES/OpenSLES_AndroidConfiguration.h>
+#include <vector>
+#include "embedders/android/sample.h"
 #include "embedders/android/types.h"
 
 class SoundService {
@@ -20,7 +22,26 @@
     int32_t PlayBackground(const char* path);
     void StopBackground();
 
+    // Optional, for preloading.
+    int32_t LoadSample(const char* path) {
+       return (GetSample(path) == NULL) ? -1 : 0;
+    }
+
+    int32_t PlaySample(const char* path);
+
   private:
+    typedef std::vector<Sample*> samples_t;
+
+    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 StartSamplePlayer();
+    Sample* GetSample(const char* path);
+
     android_app* application_;
     SLObjectItf engine_;
     SLEngineItf engine_if_;
@@ -28,8 +49,12 @@
     SLObjectItf background_player_;
     SLPlayItf background_player_if_;
     SLSeekItf background_player_seek_if_;
+    SLObjectItf sample_player_;
+    SLPlayItf sample_player_if_;
+    SLBufferQueueItf sample_player_queue_;
+    samples_t samples_;
 };
 
-void PlayBackground(const char* path);
-void StopBackground();
+int32_t PlayBackgroundSound(const char* path);
+void StopBackgroundSound();
 #endif  // EMBEDDERS_ANDROID_SOUND_SERVICE_H_