Merge "[SurfaceFlinger] Fix crash in SurfaceTracing" into rvc-dev am:...

}

status_t SurfaceTracing::writeToFile() {

    mThread.join();

    std::thread thread;

    {

        std::scoped_lock lock(mTraceLock);

        thread = std::move(mThread);

    }

    thread.join();

    return mLastErr;

}