Fix Tool Bar in “Edit Credit Card” screen

- Allow the tool bar to be shown only if
"AutofillCreditCardTableViewController" is presented.

Bug: 1003899
Change-Id: Id3661216af02eeb3f0365398b56ab59f9b977727
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1813497
Commit-Queue: Reda Tawfik <redatawfik@google.com>
Reviewed-by: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#698427}

ios/chrome/browser/ui/settings/autofill/autofill_credit_card_table_view_controller.mm

@@ -153,9 +153,13 @@ typedef NS_ENUM(NSInteger, ItemType) {
 }
 
 - (BOOL)shouldHideToolbar {
-  if (base::FeatureList::IsEnabled(kSettingsAddPaymentMethod)) {
+  // There is a bug from apple that this method might be called in this view
+  // controller even if it is not the top view controller.
+  if (self.navigationController.topViewController == self &&
+      base::FeatureList::IsEnabled(kSettingsAddPaymentMethod)) {
     return NO;
   }
+
   return [super shouldHideToolbar];
 }