Add method to obtain latency of a stream about oboe HOT 2 CLOSED

    {
        int64_t presentationFrame;
        int64_t presentationTime;
        result = AAudioStream_getTimestamp(aaudioStream,
                                           CLOCK_MONOTONIC,
                                           &presentationFrame,
                                           &presentationTime
                                           );
        if (result == AAUDIO_OK) {
            int64_t elapsedNanos = getNanoseconds() - presentationTime;
            int64_t elapsedFrames = actualSampleRate * elapsedNanos / NANOS_PER_SECOND;
            int64_t currentFrame = presentationFrame + elapsedFrames;
            int64_t framesWritten = AAudioStream_getFramesWritten(aaudioStream);
            int64_t estimatedLatencyFrames = framesWritten - currentFrame;
            int64_t estimatedLatencyMillis = estimatedLatencyFrames * 1000 / actualSampleRate;
            printf("estimatedLatencyMillis %d\n", (int)estimatedLatencyMillis);
        }
    }