Refactor UI code for better readability and consistency

- Improved formatting of ListTile icons and text styles in settings_screen.dart, telemetry_screen.dart, usb_screen.dart, gif_picker.dart, path_editor_sheet.dart, repeater_login_dialog.dart, and room_login_dialog.dart for better readability.
- Consolidated TextStyle definitions into single lines where applicable.
- Updated notification_service.dart to enhance readability of notification ID assignment.
- Simplified function signatures in routing_sheet.dart for clarity.
- Cleaned up test assertions in usb_flow_test.dart for conciseness.
- Removed unused translations in untranslated.json to streamline localization files.

lib/screens/contacts_screen.dart

@@ -705,9 +705,7 @@ class _ContactsScreenState extends State<ContactsScreen>
         action: FilledButton.icon(
           onPressed: () => Navigator.push(
             context,
-            MaterialPageRoute(
-              builder: (context) => const DiscoveryScreen(),
-            ),
+            MaterialPageRoute(builder: (context) => const DiscoveryScreen()),
           ),
           icon: const Icon(Icons.person_add_rounded),
           label: Text(context.l10n.discoveredContacts_Title),
@@ -1496,9 +1494,7 @@ class _ContactsScreenState extends State<ContactsScreen>
               ),
               title: Text(
                 context.l10n.contacts_deleteContact,
-                style: TextStyle(
-                  color: Theme.of(context).colorScheme.error,
-                ),
+                style: TextStyle(color: Theme.of(context).colorScheme.error),
               ),
               onTap: () {
                 Navigator.pop(sheetContext);