BuildVRSettings

using UnityEngine;
using UnityEditor;

public class BuildVRSettings {
    [MenuItem("VR Build Settings/Build GearVR")]
    static void BuildGearVRSettings() {
        PlayerSettings.virtualRealitySupported = true;
        GameObject.Find("VRMain").transform.GetChild(0).gameObject.SetActive(true);
        GameObject.Find("VRMain").transform.GetChild(1).gameObject.SetActive(false);
    }

    [MenuItem("VR Build Settings/Build Cardboard")]
    static void BuildCardboardSettings() {
        PlayerSettings.virtualRealitySupported = false;
        GameObject.Find("VRMain").transform.GetChild(0).gameObject.SetActive(false);
        GameObject.Find("VRMain").transform.GetChild(1).gameObject.SetActive(true);
    }
}