Prevent race in NetworkMonitorTest am: 57218af3 am: e60e4708 am: 8b5c323c

    private void testDataStall_StallTcpSuspectedAndSendMetrics(NetworkCapabilities nc)

            throws Exception {

        assumeTrue(ShimUtils.isReleaseOrDevelopmentApiAbove(Build.VERSION_CODES.Q));

        setupTcpDataStall();

        // NM suspects data stall from TCP signal and sends data stall metrics.

        setDataStallEvaluationType(DATA_STALL_EVALUATION_TYPE_TCP);

        final WrappedNetworkMonitor nm = prepareNetworkMonitorForVerifyDataStall(nc);

        setupTcpDataStall();

        // Trigger a tcp event immediately.

        setTcpPollingInterval(0);

        nm.sendTcpPollingEvent();