Accessibility focus should not affect the currently active window.

1. The event of setting an accessibility focus on a view should not
   make the host window the currently active one.

bug:6400648

Change-Id: Ib45c255f441c38489ee9d4ab5f284550ac5f6b01

Author: sganov

services/java/com/android/server/accessibility/AccessibilityManagerService.java

@@ -1731,8 +1731,7 @@ final class SecurityPolicy {
         private static final int RETRIEVAL_ALLOWING_WINDOW_CHANGE_EVENT_TYPES =
             AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED
             | AccessibilityEvent.TYPE_VIEW_HOVER_ENTER
-            | AccessibilityEvent.TYPE_VIEW_HOVER_EXIT
-            | AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED;
+            | AccessibilityEvent.TYPE_VIEW_HOVER_EXIT;
 
         private int mRetrievalAlowingWindowId;