limit number of extra binder threads in SF to 4

using namespace android;

int main(int argc, char** argv) {

    SurfaceFlinger::publishAndJoinThreadPool(true);

    // When SF is launched in its own process, limit the number of

    // binder threads to 4.

    ProcessState::self()->setThreadPoolMaxThreadCount(4);

    SurfaceFlinger::publishAndJoinThreadPool(true);

    return 0;

}