[AF] Fieldtrial test config for AutofillResetFullServerCardsOnAuthError.

Change-Id: I2dcfc3411ba478355a927874cf4b3938276288a5
Reviewed-on: https://chromium-review.googlesource.com/1103154Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568095}

testing/variations/fieldtrial_testing_config.json

@@ -485,6 +485,26 @@
             ]
         }
     ],
+    "AutofillResetFullServerCardsOnAuthError": [
+        {
+            "platforms": [
+                "android",
+                "chromeos",
+                "ios",
+                "linux",
+                "mac",
+                "win"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "AutofillResetFullServerCardsOnAuthError"
+                    ]
+                }
+            ]
+        }
+    ],
     "AutofillRestrictUnownedFieldsToFormlessCheckout": [
         {
             "platforms": [