Move adjacent tasks forward together to ensure occluding state

Bug: 204130085
Test: atest WMShellUnitTests
Change-Id: Ic1ce599d10805679ad284e75e47589b397a31d7a
diff --git a/tests/framework/base/windowmanager/util/src/android/server/wm/TestTaskOrganizer.java b/tests/framework/base/windowmanager/util/src/android/server/wm/TestTaskOrganizer.java
index f357a7d..ab02d3d 100644
--- a/tests/framework/base/windowmanager/util/src/android/server/wm/TestTaskOrganizer.java
+++ b/tests/framework/base/windowmanager/util/src/android/server/wm/TestTaskOrganizer.java
@@ -130,7 +130,8 @@
 
             // Set the roots as adjacent to each other.
             final WindowContainerTransaction wct = new WindowContainerTransaction();
-            wct.setAdjacentRoots(mRootPrimary.getToken(), mRootSecondary.getToken());
+            wct.setAdjacentRoots(mRootPrimary.getToken(), mRootSecondary.getToken(),
+                    true /* moveTogether */);
             applyTransaction(wct);
         }
     }