Habdroid dies regularly/ repoducable only since a couple of days

@belovictor, as it seems the issue still occurs because the password String is null but the length method called on it here.

By the way, what is the purpose of the username and password variables in the OpenHABNotificationAdapter? As far as I can see, the methods to set the username and password are never called?
Also, in line 44/45 it tries to read the image https://my.openhab.org/images/openhab.png which does not exist, not even when authenticated, and then uses the local fallback image again? Why does it try to read the remote image without authentication information anyway?