Add AutofillSaveCardShowNoThanks experiment to fieldtrial_testing_config

Bug: 980716
Change-Id: Ib4222f1ab31ed135705a4d3cb3be0531a8ed81a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1809408Reviewed-by: Jared Saul <jsaul@google.com>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Commit-Queue: Siddharth Shah <siashah@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697711}

testing/variations/fieldtrial_testing_config.json

@@ -1035,6 +1035,23 @@
             ]
         }
     ],
+    "AutofillSaveCardShowNoThanks": [
+        {
+            "platforms": [
+                "android",
+                "chromeos",
+                "ios"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled_20190726",
+                    "enable_features": [
+                        "AutofillSaveCardShowNoThanks"
+                    ]
+                }
+            ]
+        }
+    ],
     "AutofillSmallFormSupport": [
         {
             "platforms": [