[omnibox|drive] Add DisplayOwner param to fieldtrial_testing_config.json

Change-Id: I508b6f9cf93b577e984a86754e7353bb6b7ea86d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2566370Reviewed-by: Mark Pearson <mpearson@chromium.org>
Commit-Queue: manuk hovanesian <manukh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832421}

testing/variations/fieldtrial_testing_config.json

@@ -4840,6 +4840,9 @@
             "experiments": [
                 {
                     "name": "Enabled ",
+                    "params": {
+                        "DisplayOwner": "true"
+                    },
                     "enable_features": [
                         "OmniboxDocumentProvider"
                     ]