Glean initialize before setuploadenabled

glean.cs

        GleanInstance.Initialize(
               applicationId: "org.mycompany.glean.tests",
               applicationVersion: "0.1",
               uploadEnabled: true,
               configuration: new Configuration(channel: "debug", maxEvents: 500, pingTag: "unity_glean"),
               dataDir: "data"
               );

        GleanInstance.SetUploadEnabled(false);

        // Create a custom ping.
        var ping = new PingType<NoReasonCodes>(
            name: "custom",
            includeClientId: true,
            sendIfEmpty: false,
            reasonCodes: null
        );

        // Init launch ping.
        var metric = new StringMetricType(
            category: "hello_world",
            disabled: false,
            lifetime: Lifetime.Application,
            name: "test",
            sendInPings: new string[] { "custom" }
        );

        metric.Set("my_data");
        ping.Submit();