Rename field trial experiment group name to match Finch config.

This fixes Finch presubmit warning for GroupSuggestionsBySearchVsUrl
experiment.

Bug: 990865
Change-Id: Id294e8de22098e7d5750fb393f6f7ed158ad12c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1760459Reviewed-by: Ender <ender@google.com>
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Auto-Submit: Ender <ender@google.com>
Commit-Queue: Jesse Doherty <jwd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#688296}

testing/variations/fieldtrial_testing_config.json

@@ -3881,7 +3881,7 @@
             ],
             "experiments": [
                 {
-                    "name": "AndroidExperiments",
+                    "name": "Enabled",
                     "enable_features": [
                         "OmniboxGroupSuggestionsBySearchVsUrl"
                     ]