[CloudToken] Include <vector> for std::vector<T>.

IWYU, and fix the libstdc++ build:

../../chrome/browser/ui/autofill/payments/virtual_card_selection_dialog_controller.h:28:22: error: no template named 'vector' in namespace 'std'
  virtual const std::vector<CreditCard*>& GetCardList() const = 0;
                ~~~~~^
In file included from ../../chrome/browser/ui/autofill/payments/virtual_card_selection_dialog_controller_impl.cc:5:
../../chrome/browser/ui/autofill/payments/virtual_card_selection_dialog_controller_impl.h:36:55: error: only virtual member functions can be marked 'override'
  const std::vector<CreditCard*>& GetCardList() const override;
                                                      ^~~~~~~~

Bug: 957519
Change-Id: Ie4466ed7be0d8392149a64c89d0871621e4e4687
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1973822
Auto-Submit: Raphael Kubo da Costa <raphael.kubo.da.costa@intel.com>
Commit-Queue: Evan Stade <estade@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726011}

chrome/browser/ui/autofill/payments/virtual_card_selection_dialog_controller.h

@@ -5,6 +5,8 @@
 #ifndef CHROME_BROWSER_UI_AUTOFILL_PAYMENTS_VIRTUAL_CARD_SELECTION_DIALOG_CONTROLLER_H_
 #define CHROME_BROWSER_UI_AUTOFILL_PAYMENTS_VIRTUAL_CARD_SELECTION_DIALOG_CONTROLLER_H_
 
+#include <vector>
+
 #include "base/macros.h"
 #include "base/strings/string16.h"