Nextcloud Login flow: provide default DAV_PATH (/remote.php/dav) (#497)

        /** Path to DAV endpoint (e.g. `/remote.php/dav`). Will be appended to the

         *  server URL returned by Login Flow without further processing. */

        const val EXTRA_DAV_PATH = "davPath"

        const val DAV_PATH_DEFAULT = "/remote.php/dav"

    }

    val loginModel by activityViewModels<LoginModel>()

    val model by viewModels<Model>()

    val checkResultCallback = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {

        val davPath = requireActivity().intent.getStringExtra(EXTRA_DAV_PATH)

        val davPath = requireActivity().intent.getStringExtra(EXTRA_DAV_PATH) ?: DAV_PATH_DEFAULT

        model.checkResult(davPath)

    }