Maven now requires https, set robolectric to use that instead

app/src/test/resources/robolectric.properties

+# Quasseldroid - Quassel client for Android
+#
+# Copyright (c) 2020 Janne Mareike Koschinski
+# Copyright (c) 2020 The Quassel Project
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 3 as published
+# by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program. If not, see <http://www.gnu.org/licenses/>.
+
+robolectric.dependency.repo.url=https://repo1.maven.org/maven2