Merge "Call dmabuf_dump tool in dumpstate"

    // Run iotop as root to show top 100 IO threads

    RunCommand("IOTOP", {"iotop", "-n", "1", "-m", "100"});

    // Gather shared memory buffer info if the product implements it

    struct stat st;

    if (!stat("/product/bin/dmabuf_dump", &st)) {

        RunCommand("Dmabuf dump", {"/product/bin/dmabuf_dump"});

    }

    if (!DropRootUser()) {

        return false;

    }