[iOS] Should turn on autocomplete wallet with sync everything toggle

Autocomplete wallet needs to be explicitly turned on when the user turns
on sync everything.

Bug: 938012
Change-Id: I2c90e592a39b6f305c0c4212b2ef7d1eadcf1681
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1505497Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638129}

ios/chrome/browser/ui/settings/google_services/manage_sync_settings_mediator.mm

@@ -404,6 +404,12 @@ NSString* kGoogleServicesSyncErrorImage = @"google_services_sync_error";
     switch (itemType) {
       case SyncEverythingItemType:
         self.syncSetupService->SetSyncingAllDataTypes(value);
+        if (value) {
+          // When sync everything is turned on, the autocomplete wallet
+          // should be turned on. This code can be removed once
+          // crbug.com/937234 is fixed.
+          self.autocompleteWalletPreference.value = true;
+        }
         break;
       case AutofillDataTypeItemType:
       case BookmarksDataTypeItemType: