Make Native Gellerization fieldtest name match Finch experiment name

This is needed to allow the Finch experiment CL enabling the
feature in Beta to be submitted.

Bug: 943901
Change-Id: I77b1bf1c46b501d263748fb83a176e4ab7a7ea2f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1880179Reviewed-by: Brian White <bcwhite@chromium.org>
Commit-Queue: Dan S <danan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709622}

testing/variations/fieldtrial_testing_config.json

@@ -1560,21 +1560,6 @@
             ]
         }
     ],
-    "ChromeOSParentalControlsSettings": [
-        {
-            "platforms": [
-                "chromeos"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "ChromeOSParentalControlsSettings"
-                    ]
-                }
-            ]
-        }
-    ],
     "ChromeSmartSelection": [
         {
             "platforms": [
@@ -3591,6 +3576,21 @@
             ]
         }
     ],
+    "NativeGellerizationRollout": [
+        {
+            "platforms": [
+                "chromeos"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "ChromeOSParentalControlsSettings"
+                    ]
+                }
+            ]
+        }
+    ],
     "NativeNotifications": [
         {
             "platforms": [