add system

Signed-off-by: Nzhangrao <zhangrao@huawei.com>

ace/ace_ets_component_two/entry/src/main/ets/MainAbility/pages/animationStatus.ets

@@ -22,7 +22,6 @@ struct ImageAnimatorExample {
   @State reverse: boolean = false;
   @State iterations: number = 1;
 
-
   build() {
     Column({ space:5 }) {
       ImageAnimator()

ace/ace_ets_component_two/entry/src/main/ets/MainAbility/pages/bindPopup.ets

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import events_emitter from '@ohos.emitter';
+import events_emitter from '@ohos.emitter'
 
 @Entry
 @Component

ace/ace_ets_component_two/entry/src/main/ets/MainAbility/pages/divider.ets

@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 import events_emitter from '@ohos.emitter';
+
 @Entry
 @Component
 struct DividerExample {

ace/ace_ets_component_two/entry/src/main/ets/MainAbility/pages/flexDirection.ets

@@ -22,7 +22,6 @@ struct flexDirectionExample {
   @State height: number = 40
   @State backgroundColor: Color = 0xD2B48C
 
-
   build() {
     Column() {
       Column({ space: 5 }) {

ace/ace_ets_component_two/entry/src/main/ets/MainAbility/pages/systemPrompt.ets

@@ -13,7 +13,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import events_emitter from '@ohos.emitter';
 import prompt from '@system.prompt';
 
 @Entry