修复iOS 无障碍问题

flutter 页面 连续push的时候，后面的flutter页面的voice over焦点会丢失

lib/container/container_coordinator.dart

@@ -225,8 +225,7 @@ class ContainerCoordinator {
     FlutterBoost.containerManager
         ?.showContainer(_createContainerSettings(name, params, pageId));
 
-    //在Android上对无障碍辅助模式的兼容
-    if (Platform.isAndroid) {
+    //对无障碍辅助模式的兼容
     try {
       final SemanticsOwner owner =
           WidgetsBinding.instance.pipelineOwner?.semanticsOwner;
@@ -236,7 +235,6 @@ class ContainerCoordinator {
     } catch (e) {
       assert(false, e.toString());
     }
-    }
 
     performContainerLifeCycle(_createContainerSettings(name, params, pageId),
         ContainerLifeCycle.Appear);