Merge "Call onDismissed on dismiss even mUserSwitchingDialog is null." into udc-dev am: 3cb2720640

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23289736

Change-Id: Idfaedab57beb941f7b26406ece938cf2e61c43a1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

services/core/java/com/android/server/am/UserController.java

@@ -3567,6 +3567,8 @@ class UserController implements Handler.Callback {
                 if (mUserSwitchingDialog != null) {
                     mUserSwitchingDialog.dismiss(onDismissed);
                     mUserSwitchingDialog = null;
+                } else if (onDismissed != null) {
+                    onDismissed.run();
                 }
             }
         }