enable omnibar refactor in rollout (duckduckgo#2416)

* enable omnibar refactor in rollout

* start with 5%

* set new min app version

Author: malmstein

overrides/android-override.json

@@ -1368,7 +1368,15 @@
             "state": "enabled",
             "features": {
                 "refactor": {
-                    "state": "internal"
+                    "state": "enabled",
+                    "minSupportedVersion": 52190000,
+                    "rollout": {
+                        "steps": [
+                            {
+                                "percent": 5
+                            }
+                        ]
+                    }
                 }
             }
         },