some backend fixes and add android app

android/app/src/test/resources/fixtures/auth_me.json

@@ -0,0 +1,8 @@
+{
+  "authenticated": true,
+  "login_required": true,
+  "username": "timka",
+  "password_login_enabled": true,
+  "telegram_login_enabled": false,
+  "telegram_bot_username": ""
+}