TC75x Android Marshmallow setting alternative display switch off timeout


In standard Android you can set display switch off timeout due to user inactivity to 15 or 30 seconds. I did not find any MX feature allowing to set different value. I have a tender where required timeout value is 20 seconds. Of course I can ask for dedicated BSP via CPR but this is last considered option (cost and time). Maybe anyone has idea of some programming trick that allows to change this timeout not having signed app or unlocked priviliged system APIs?