Allows enabling or disabling Fast Transition.
This applies to all users, and to all interfaces on the device.
In order for Fast Transition to be used, both this setting and the per-network ONC property need to be enabled.
Once set, Fast Transition persists until the policy is changed to disable it.
If this policy is not set or set to false, Fast Transition is not used.
If set to true, Fast Transition is used when the wireless access point supports it.