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/settings_screen.dart

@@ -343,7 +343,10 @@ class _SettingsScreenState extends State<SettingsScreen> {
             ),
           ),
           ListTile(
-            leading: Icon(Icons.delete_outline, color: Theme.of(context).colorScheme.error),
+            leading: Icon(
+              Icons.delete_outline,
+              color: Theme.of(context).colorScheme.error,
+            ),
             title: Text(l10n.settings_deleteAllPaths),
             subtitle: Text(
               l10n.settings_deleteAllPathsSubtitle,
@@ -367,7 +370,10 @@ class _SettingsScreenState extends State<SettingsScreen> {
           ),
           const Divider(height: 1),
           ListTile(
-            leading: Icon(Icons.restart_alt, color: Theme.of(context).colorScheme.tertiary),
+            leading: Icon(
+              Icons.restart_alt,
+              color: Theme.of(context).colorScheme.tertiary,
+            ),
             title: Text(l10n.settings_rebootDevice),
             subtitle: Text(l10n.settings_rebootDeviceSubtitle),
             onTap: () => _confirmReboot(context, connector),