Prevent setting position to a surface attached to leash

Make sure to only update surface position when it's not attached to
leash to prevent double offset the surface.

Fix: 232745449
Test: add log to verify taskbar won't disappear with the same flow in
      bug.
Change-Id: Ide9a2a5ebee40783620a14d7d7835cd87d892140

services/core/java/com/android/server/wm/WindowState.java

@@ -809,7 +809,8 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
     };
 
     private final Consumer<SurfaceControl.Transaction> mSetSurfacePositionConsumer = t -> {
-        if (mSurfaceControl != null && mSurfaceControl.isValid()) {
+        // Only apply the position to the surface when there's no leash created.
+        if (mSurfaceControl != null && mSurfaceControl.isValid() && !mSurfaceAnimator.hasLeash()) {
             t.setPosition(mSurfaceControl, mSurfacePosition.x, mSurfacePosition.y);
         }
     };