TF-3586: Upgrade Flutter to 3.27.4

lib/features/manage_account/presentation/widgets/setting_explanation_widget.dart

@@ -21,7 +21,7 @@ class SettingExplanationWidget extends StatelessWidget {
     Widget child = Text(
       menuItem.getExplanation(AppLocalizations.of(context)),
       style: ThemeUtils.textStyleM3BodyMedium1
-          .copyWith(color: AppColor.gray424244.withOpacity(0.64)),
+          .copyWith(color: AppColor.gray424244.withValues(alpha: 0.64)),
     );
 
     if (isCenter) {

lib/features/manage_account/presentation/widgets/setting_header_widget.dart

@@ -36,7 +36,7 @@ class SettingHeaderWidget extends StatelessWidget {
               fontSize: 16,
               height: 21.01 / 16,
               letterSpacing: -0.15,
-              color: AppColor.gray424244.withOpacity(0.64),
+              color: AppColor.gray424244.withValues(alpha: 0.64),
             ),
           ),
         ),