Android截屏－－圆桌面同时按住power与音量-截图-截图无声音

问题描述：

【测试步骤】1、桌面同时按住power与音量-截图
【测试结果】截图无声音
【预期结果】不应该无声音

这是一个google common问题，问题原因如下：
decode does not complete when first capture.
solution: for audio sound pool case, skip EOS delay time to faster to send out EOS. 

修改位置：frameworks/av/media/libstagefright/AwesomePlayer.cpp

void AwesomePlayer::postCheckAudioStatusEvent(int64_t delayUs) {    Mutex::Autolock autoLock(mAudioLock);    if (mAudioStatusEventPending) {        return;    }    mAudioStatusEventPending = true;    // Do not honor delay when looping in order to limit audio gap    if (mFlags & (LOOPING | AUTO_LOOPING)) {        delayUs = 0;    }#ifdef MTK_AOSP_ENHANCEMENT    // AudioCache needn't delay post EOS, just AudioOutput which with a valid UID needed    if(!mUIDValid){        ALOGI("AudioCache needn't delay post EOS!!!");        //<2015.05.07> modify for start        delayUs = 0;        //<2015.05.07> modify for end    }#endif    mQueue.postEventWithDelay(mCheckAudioStatusEvent, delayUs);}