Add OmniboxDNSInterceptionChecksPolicyRollout to policy_config

Change-Id: Icd30a001d44487a7536dc75cbaeb91d4c9038f9a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2643027Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Commit-Queue: Travis Skare <skare@chromium.org>
Cr-Commit-Position: refs/heads/master@{#846205}

testing/variations/fieldtrial_testing_config.json

@@ -4456,6 +4456,24 @@
             ]
         }
     ],
+    "OmniboxDNSInterceptionChecksPolicyRollout": [
+        {
+            "platforms": [
+                "chromeos",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "OmniboxDNSInterceptionChecksPolicyRollout"
+                    ]
+                }
+            ]
+        }
+    ],
     "OmniboxDocumentProviderNonDogfoodExperiments": [
         {
             "platforms": [