Add missing import

Author: FirentisTFW

packages/video_player/video_player_android/example/android/app/src/androidTest/java/io/flutter/plugins/videoplayerexample/VideoPlayerUITest.java

@@ -14,6 +14,8 @@
 
 import androidx.test.ext.junit.rules.ActivityScenarioRule;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;