Enables users to set weak PINs for the lock screen PIN

If false, users will be unable to set PINs which are weak and easy to guess.

Some example weak PINs: PINs containing only one digit (1111), PINs whose digits are increasing by 1 (1234), PINs whose digits are decreasing by 1 (4321) and PINs which are commonly used.

By default, users will get a warning, not error, if the PIN is considered weak.