AbusiveOriginNotificationPermissionRevocation beta.

This CL adds AbusiveOriginNotificationPermissionRevocation study into
fieldtrial_testing_config.json.

Bug: 1159417
Change-Id: Id33d0876d7f6085d3a144a564d8564bc888a7743
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2595287Reviewed-by: Balazs Engedy <engedy@chromium.org>
Commit-Queue: Balazs Engedy <engedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837608}

testing/variations/fieldtrial_testing_config.json

@@ -14,6 +14,25 @@
             ]
         }
     ],
+    "AbusiveOriginNotificationPermissionRevocation": [
+        {
+            "platforms": [
+                "android",
+                "chromeos",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled_1",
+                    "enable_features": [
+                        "AbusiveOriginNotificationPermissionRevocation"
+                    ]
+                }
+            ]
+        }
+    ],
     "AddToHomescreenMessaging": [
         {
             "platforms": [