Feature request: Lock task mode to prevent unauthorized access

[JackMostow]

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is.
User can intentionally or accidentally access other apps while running RoboTutor, e.g. dragging down from top or up from bottom.

Describe the solution you'd like
A clear and concise description of what you want to happen.
Disable unauthorized access.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.
We used kiosk mode at XPRIZE sites, but it required a cumbersome installation procedure.

Approach to be followed (optional)
A clear and concise description of approach to be followed.
Lock task mode programmatically when launch RoboTutor if specified in config.json

Additional context
Add any other context or screenshots about the feature request here.
Is this a problem in practice under supervised use?
What happens at exit or crash?
What about FaceLogin?