Remove flaky test LifecycleTest.testDialog from large continuous suite.

BUG 1866891

Change-Id: Ifef98426cf3879fc9f17aa5a0891578fefa54ce3

tests/AndroidTests/src/com/android/unit_tests/activity/LifecycleTest.java

@@ -67,7 +67,8 @@ public class LifecycleTest extends ActivityTestsBase {
         runLaunchpad(LaunchpadActivity.LIFECYCLE_SCREEN);
     }
 
-    @LargeTest
+    //flaky test, removing from large suite until 1866891 is fixed
+    //@LargeTest
     public void testDialog() throws Exception {
         mIntent = mTopIntent;
         runLaunchpad(LaunchpadActivity.LIFECYCLE_DIALOG);