Merge "adjust audio timestamp to account for AudioRecord latency" into mnc-dr-dev

status_t AudioSource::dataCallback(const AudioRecord::Buffer& audioBuffer) {

    int64_t timeUs = systemTime() / 1000ll;

    // Estimate the real sampling time of the 1st sample in this buffer

    // from AudioRecord's latency. (Apply this adjustment first so that

    // the start time logic is not affected.)

    timeUs -= mRecord->latency() * 1000LL;

    ALOGV("dataCallbackTimestamp: %" PRId64 " us", timeUs);

    Mutex::Autolock autoLock(mLock);