GSMTool v1.1.1 - MVola direct USSD fix

Fix:
- MVola code #111*...# is now recognized as USSD.
- Previously only codes beginning with * were considered USSD, so #111*...# was opened with ACTION_DIAL.
- Now the app requests CALL_PHONE permission and uses ACTION_CALL directly.
- On first use, allow the Phone/Calls permission.

Expected result:
Tap "Ouvrir l’appel MVola" -> if permission is not granted, Android asks once -> after Allow, the USSD call starts directly without stopping on the dialer screen.