Allow access to display manager service from isolated processes.

Bug: 6921302
Change-Id: I9eed4a24992538e18ad0540b96a8cea2c8a9ef76

Author: Jeff Brown

services/java/com/android/server/SystemServer.java

@@ -152,7 +152,7 @@ public void run() {
 
             Slog.i(TAG, "Display Manager");
             display = new DisplayManagerService();
-            ServiceManager.addService(Context.DISPLAY_SERVICE, display);
+            ServiceManager.addService(Context.DISPLAY_SERVICE, display, true);
 
             Slog.i(TAG, "Activity Manager");
             context = ActivityManagerService.main(factoryTest);