modify interface of SeekMode

Signed-off-by: Ncaocan <1532643766@qq.com>
Change-Id: I11e3e526db58ba50f6cf75a861b3683e826928be

ace/ace_ets_test/entry/src/main/ets/MainAbility/pages/Video.ets

@@ -79,16 +79,16 @@ struct VideoCreateComponent {
           this.myVideoController.setCurrentTime(9);
         });
         Button("setCurrentTime").onClick(() => {
-          this.myVideoController.setCurrentTime(9, SeekMode.PreviousSync);
+          this.myVideoController.setCurrentTime(9, SeekMode.PreviousKeyframe);
         });
         Button("setCurrentTime").onClick(() => {
-          this.myVideoController.setCurrentTime(9, SeekMode.NextSync);
+          this.myVideoController.setCurrentTime(9, SeekMode.NextKeyframe);
         });
         Button("setCurrentTime").onClick(() => {
-          this.myVideoController.setCurrentTime(9, SeekMode.Closest);
+          this.myVideoController.setCurrentTime(9, SeekMode.ClosestKeyframe);
         });
         Button("setCurrentTime").onClick(() => {
-          this.myVideoController.setCurrentTime(9, SeekMode.ClosestSync);
+          this.myVideoController.setCurrentTime(9, SeekMode.Accurate);
         });
       }
     }