Merge changes from topic "libinit_test_utils-build-error" into rvc-dev am:...

    }

    if (bootstrap_ns_id != GetMountNamespaceId() && bootstrap_ns_fd.get() != -1 &&

        IsApexUpdatable()) {

        // The property service thread and its descendent threads must be in the correct mount

        // namespace to call Service::Start(), however setns() only operates on a single thread and

        // fails when secondary threads attempt to join the same mount namespace.  Therefore, we

        // must join the property service thread and its descendents before the setns() call.  Those

        // threads are then started again after the setns() call, and they'll be in the proper

        // namespace.

        PausePropertyService();

        if (setns(bootstrap_ns_fd.get(), CLONE_NEWNS) == -1) {

            PLOG(ERROR) << "Failed to switch to bootstrap mount namespace.";

            return false;

        }

        ResumePropertyService();

    }

    return true;

}