Add fieldtrialtesting config for AutofillEnableCardInfoRetrieval

Bug: 369472865
Change-Id: If3ec32e73c9cf93bd7d41ccb7b7c99ad8277cede
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6319957
Commit-Queue: Harsh Shukla <hvs@google.com>
Reviewed-by: Olivia Saul <jsaul@google.com>
Reviewed-by: Vinny Persky <vinnypersky@google.com>
Cr-Commit-Position: refs/heads/main@{#1427522}

testing/variations/fieldtrial_testing_config.json

@@ -1791,6 +1791,26 @@
             ]
         }
     ],
+    "AutofillEnableCardInfoRuntimeRetrieval": [
+        {
+            "platforms": [
+                "android",
+                "chromeos",
+                "chromeos_lacros",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "AutofillEnableCardInfoRuntimeRetrieval"
+                    ]
+                }
+            ]
+        }
+    ],
     "AutofillEnableDisablingSuggestionsOnJSFocus": [
         {
             "platforms": [