!380 事件冒泡机制从API version 5开始支持，且事件默认是冒泡的。但应兼容迁移过来的旧应用（API version4）使其默认不冒泡。

Merge pull request !380 from youzhi92/cherry-pick-1632472488

frameworks/src/core/components/component.cpp

@@ -130,6 +130,18 @@ bool Component::Render()
     }
     STOP_TRACING();
 
+    // The event bubbling mechanism is supported from API version 5, and events are bubbled by default.
+    // However, it should be compatible with the migrated old application (API version 4) 
+    // so that it does not bubble by default.
+    const int32_t supportEventBubbleApiVersion = 5;
+    if (JsAppContext::GetInstance()->GetTargetApi() < supportEventBubbleApiVersion) {
+        UIView *view = GetComponentRootView();
+        if (view != nullptr) {
+            // make events non bubbling by default.
+            view->SetIntercept(true);
+        }
+    }
+
     SetViewExtraMsg();
 
     // step2: binding js object with this component