UserManager.setUserName: clearCallingId pre-Broadcast

UserManagerService.setUserName sends a broadcast to all users.
Without doing clearCallingIdentity first, it would require
INTERACT_ACROSS_USERS permission, which is not required for
this function.

Bug: 128576953
Test: Manual
Change-Id: Ia577248f48234eb9b73e53f9f9da04a86c324e12

services/core/java/com/android/server/pm/UserManagerService.java

@@ -1299,7 +1299,12 @@ public class UserManagerService extends IUserManager.Stub {
             }
         }
         if (changed) {
-            sendUserInfoChangedBroadcast(userId);
+            long ident = Binder.clearCallingIdentity();
+            try {
+                sendUserInfoChangedBroadcast(userId);
+            } finally {
+                Binder.restoreCallingIdentity(ident);
+            }
         }
     }