Rephrase "Lock" term to make it clearer that it is a app access restriction

[AndyScherzinger]

see https://help.nextcloud.com/t/android-client-pin-fingerprint-protection-pointless/33590/2

The thread shows that the access restriction we have is/can be misinterpreted as a file access restriction while it is a app access restriction. So I think we should thus show this fact as in maybe renaming "Lock" to "App access restriction" or something like that. Not a native speaker so maybe @nextcloud/designers or @mario @tobiasKaminsky have a better term to be used here :)

[tobiasKaminsky]

To make it a bit clearer what we are talking about (for others):

This protects the app from starting without entering correct pin/device credentials (fingerprint, password, …).
It is not meant to protect downloaded files on internal storage.

Suggestion:

• app protection
• App lock
• Lock, but with a text "prevents unauthorized people from using app"

[jancborchardt]

I would say "App passcode". Because stuff like "App protection" or "App security" with "none" below it seems strange. ;)

The text below should reflect the currently enabled passcode method like it is now.

(Yes, when it’s set to passcode it will say "App passcode" and below "Passcode", but I’d say that’s ok?)

[AndyScherzinger]

Sounds good to me 👍