adds entry for AutofillCreditCardPopupLayout

testing/variations/fieldtrial_testing_config.json

Index: testing/variations/fieldtrial_testing_config.json
diff --git a/testing/variations/fieldtrial_testing_config.json b/testing/variations/fieldtrial_testing_config.json
index d9bc5da4e0cc8a90f23d99777b263b972dd057be..32eec9492ed61c81c3c01eec59d0c6a695d9e307 100644
--- a/testing/variations/fieldtrial_testing_config.json
+++ b/testing/variations/fieldtrial_testing_config.json
@@ -95,6 +95,26 @@
             ]
         }
     ],
+    "AutofillCreditCardPopup": [
+        {
+            "platforms": [
+                "android"
+            ],
+            "experiments": [
+                {
+                    "name": "IconAtStartAndIncreaseDropdownItemHeight",
+                    "params": {
+                        "dropdown_item_height": "56",
+                        "is_credit_card_icon_at_start": "true",
+                        "margin": "18"
+                    },
+                    "enable_features": [
+                        "AutofillCreditCardPopupLayout"
+                    ]
+                }
+            ]
+        }
+    ],
     "AutofillCreditCardSigninPromo": [
         {
             "platforms": [