add password change menu item

### Is your feature request related to a problem? Please describe.

If you had previously used an app password, or changed your password, the nextcloud app will take a LONG time to decide that the errors it receives should be surfaced to the user.

If you go to get information about that account via the manage account page, after a long time (more than 20 seconds), it's report Error retrieving user information, socket timeout exception.

or sometimes, it'll say Operation finished with HTTP status code 401 (fail), but without any ability to set/change the password.

### Describe the solution you'd like

When you know the password is incorrect, the manage accounts should have a way to initiate a new login/change password to not have to wait so long for these failures.

(it'd also be nice to set a lower timeout or something)

### Describe alternatives you've considered

Waiting WAY too long for the timeout when browsing the files for the app to decide that the problem is a password issue.

### Additional context

This is using version 3.14.0 on Android 11