Fix SurfaceControl leakage

Release SurfaceControl when removing display.

Bug: 111966289
Test: go/wm-smoke

Change-Id: Iff72a87a3ede3324cde9c1f96a63ec64023b8ff0
diff --git a/services/core/java/com/android/server/wm/DisplayContent.java b/services/core/java/com/android/server/wm/DisplayContent.java
index 621b0c0..7d1c020 100644
--- a/services/core/java/com/android/server/wm/DisplayContent.java
+++ b/services/core/java/com/android/server/wm/DisplayContent.java
@@ -2055,6 +2055,8 @@
                 }
             }
             mService.mAnimator.removeDisplayLocked(mDisplayId);
+            mWindowingLayer.release();
+            mOverlayLayer.release();
         } finally {
             mRemovingDisplay = false;
         }