Fix race condition in AudioTrackThread::wake

void AudioTrack::AudioTrackThread::wake()

{

    AutoMutex _l(mMyLock);

    if (!mPaused && mPausedInt && mPausedNs > 0) {

        // audio track is active and internally paused with timeout.

    if (!mPaused) {

        // wake() might be called while servicing a callback - ignore the next

        // pause time and call processAudioBuffer.

        mIgnoreNextPausedInt = true;

        if (mPausedInt && mPausedNs > 0) {

            // audio track is active and internally paused with timeout.

            mPausedInt = false;

            mMyCond.signal();

        }

    }

}

void AudioTrack::AudioTrackThread::pauseInternal(nsecs_t ns)

{