Calibration button prefab

[thefirstfloor]

Add the calibration call prefab, as it works in the Vive and Varjo package.

[eioe]

from PICO devs:
(https://bytedance.sg.larkoffice.com/docx/NE7Wd4ZPmoWxLAxMSFnlsQnqgMg)

using UnityEngine;

public class EyeTrackingCalibration : MonoBehaviour
{
    void Start()
    {
        PXR_Enterprise.InitEnterpriseService();
        PXR_Enterprise.BindEnterpriseService((bound) =>
        {
            Debug.Log("Bind success.");
        });

        StartCoroutine(StartCalibration());
    }

    IEnumerator StartCalibration()
    {
        yield return new WaitForSeconds(1);

        // Call the function to force eye tracking calibration
        ForceEyeTrackingCalibrationP4E();
        //or
        //ForceEyeTrackingCalibrationN3PE();

        yield return null;
    }

    void ForceEyeTrackingCalibrationP4E()
    {
        // Force eye tracking calibration using PICO 4 Enterprise SDK
        PXR_Enterprise.StartActivity("com.pvr.et_calib", "com.pvr.et_calib.MainActivity", "", "", new string[0], new int[0]);
    }
    
    void ForceEyeTrackingCalibrationN3PE()
    {
        // Force eye tracking calibration using Neo 3 Pro Eye Enterprise SDK
        PXR_Enterprise.StartActivity("com.tobii.usercalibration.neo3", "com.tobii.usercalibration.neo3.UnityCalibrationActivity", "", "", new string[0], new int[0]);
}