Solve XTS ActsOnAndOffScreenTest fail problem

Signed-off-by: Nz00445003 <zhoujun62@huawei.com>
Change-Id: I5f86999e703a9121b659d2d793ba5c7bb2febbff

ability/ability_runtime/actssupportfunction/actsonandoffscreentest/entry/src/main/ets/test/OnAndOffScreenTest.test.ets

@@ -52,6 +52,7 @@ export default function OnAndOffScreenTest() {
     })
 
     async function slideScreen(TAG) {
+      await sleep(1500)
       console.log(TAG + "slideScreen start");
       var driver = UiDriver.create();
       await driver.swipe(1000, 3000, 1000, 500, 1200);
@@ -631,4 +632,4 @@ export default function OnAndOffScreenTest() {
       })
     })
   })
-}
\ No newline at end of file
+}