Disable the autofill/wallet settings in chrome://settings/autofill

Will merge this to M42, then revert on trunk.

BUG=460900

Review URL: https://codereview.chromium.org/949753006

Cr-Commit-Position: refs/heads/master@{#317638}

chrome/browser/ui/webui/options/autofill_options_handler.cc

@@ -340,8 +340,7 @@ void AutofillOptionsHandler::GetLocalizedValues(
   SetCreditCardOverlayStrings(localized_strings);
 
   localized_strings->SetBoolean(
-      "enableAutofillWalletIntegration",
-      personal_data_->IsExperimentalWalletIntegrationEnabled());
+      "enableAutofillWalletIntegration", false);
   localized_strings->SetString(
       "manageWalletAddressesUrl",
       autofill::wallet::GetManageAddressesUrl(0).spec());