Add longer "lock after" option

## Issue Checklist

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- [x] searched existing (and closed) issues: https://github.com/cryptomator/cryptomator-android/issues
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## Basic Info

I'm using Android in version: `9`

I'm running Cryptomator in version: `1.4.3-rc1`

## Description

Currently there's 1, 2, 5 and 10 minutes lock besides `Never`.
It would be good if there would be some long term options as well (this is a _bit_ related to [issue 164](https://github.com/cryptomator/cryptomator-android/issues/164)).
For example 1 hour, 3 hours, 9 hours and 1 day. Also I'm not quite sure whether there's a huge benefit in deciding between one and two minutes.

Maybe it would even be the best option to let users decide which lock timeout they want. For instance some input box with `[____5____] minutes` and the number can be changed to whatever timeout is wanted. Or maybe even make the time unit changeable (`minutes`, `hours`, `days`).