!5299 fix ability foreground failed

Merge pull request !5299 from laoyitong/0829

ability/ability_runtime/apitest/entry/src/main/ets/MainAbility2/MainAbility2.ts

@@ -38,7 +38,9 @@ export default class MainAbility2 extends Ability {
         windowStage.setUIContent(this.context, "pages/index", null)
         windowStage.on('windowStageEvent', (data)=>{
             if(data == 2){
+                setTimeout(()=>{
                     commonEvent.publish("ACTS_DoAbility_Event", PublishCallBackOne);
+                }, 2000)
             }
         })
     }