fix issue 1641535: SoundPool should use AudioTrack with shared memory buffer

#define LOG_TAG "SoundPool"

#include <utils/Log.h>

//#define USE_SHARED_MEM_BUFFER

//

#define USE_SHARED_MEM_BUFFER

// XXX needed for timing latency

#include <utils/Timers.h>

        frameCount = sample->size()/numChannels/((sample->format() == AudioSystem::PCM_16_BIT) ? sizeof(int16_t) : sizeof(uint8_t));

    }

#ifndef USE_SHARED_MEM_BUFFER

    // Ensure minimum audio buffer size in case of short looped sample

    if(frameCount < kDefaultBufferCount * bufferFrames) {

        frameCount = kDefaultBufferCount * bufferFrames;

    }

#endif

    AudioTrack* newTrack;