Login over Intent should continue to "Login with URL"

[rfc2822]

Steps to reproduce:

1. Start DAVx5 with an Intent that contains an URL (+ username/password):

adb shell am start -d https://test:test@example.com/path/ at.bitfire.davdroid/at.bitfire.davdroid.ui.setup.LoginActivity

2. DAVx5 opens the Login screen with Login with URL and user name pre-selected, but doesn't continue automatically.
3. If you continue (to the login details page), URL, username and password are set correctly.

Expected:

DAVx5 should start with the login details page automatically when the login type is determined by the Intent.