This feature will allow you to unlock your phone within the time period with your fingerprint and not force the user to have to use a PIN/password?

Isn't fingerprint more secure? I'm my opinion if someone who isn't me ends up with my unlock pin or password by say eaves dropping in the screen when I unlock the phone i would want to force the fingerprint after an allotted amount of time after the screen locks.
The majority of unauthorized unlocks are when after the pin has been snooped and the phone is sitting unattended without the owner full attention, like when laced on the charger, intended snoop removed it from its charging place to snoop the phone because logical thought tells us that's when the easiest window occurs. Phone s left out of direct attention of the owner for long periods of time when on charge, that's when I would want the fingerprint to be forced and the pin or password disabled.

It might be worth dealing with a situation where a super-secure fingerprint is used against your will or when you are unconscious.

The fact that you can opt out of using and storing biometrics and disabling finger print all together if the user is worried about the use of their fingerprint when unconscious would be 100% safer than installing an application that requires the use of a permission granting the developer remote administration privileges and trusting the developer with the sensitive said data they fear may be stolen while unconscious. In one scenario the user sacrifices a functionality in order to protect their sensitive data, and one scenario the user gives the developer his sensitive data willingly under the masquerade they are installing an application to reduce the risk of sensitive data leak.

Administrative privileges are required to automatically disable biometrics (only force-lock )
device_admin_receiver.xml

<?xml version="1.0" encoding="utf-8"?>
<device-admin>
    <uses-policies>
        <force-lock />
    </uses-policies>
</device-admin>

Unfortunately this is how the api works, you can check the source code and make sure that no data is collected or transmitted.