Update windows before sending a window state change event

Change-Id: Ie25b75ccc739dcacbbffd2b3a32fe65086882c64
diff --git a/services/core/java/com/android/server/wm/AccessibilityController.java b/services/core/java/com/android/server/wm/AccessibilityController.java
index a5ddf5a..894c27c 100644
--- a/services/core/java/com/android/server/wm/AccessibilityController.java
+++ b/services/core/java/com/android/server/wm/AccessibilityController.java
@@ -115,6 +115,16 @@
         }
     }
 
+    public void performComputeChangedWindowsNotLocked() {
+        WindowsForAccessibilityObserver observer = null;
+        synchronized (mWindowManagerService) {
+            observer = mWindowsForAccessibilityObserver;
+        }
+        if (observer != null) {
+            observer.performComputeChangedWindowsNotLocked();
+        }
+    }
+
     public void setMagnificationSpecLocked(MagnificationSpec spec) {
         if (mDisplayMagnifier != null) {
             mDisplayMagnifier.setMagnificationSpecLocked(spec);