For #23990 - Allow for Nimbus experimentation for Contile top sites

app/src/main/java/org/mozilla/fenix/utils/Settings.kt

@@ -1292,9 +1292,9 @@ class Settings(private val appContext: Context) : PreferencesHolder {
     /**
      * Indicates if the Contile functionality should be visible.
      */
-    var showContileFeature by featureFlagPreference(
+    var showContileFeature by lazyFeatureFlagPreference(
         key = appContext.getPreferenceKey(R.string.pref_key_enable_contile),
-        default = false,
+        default = { homescreenSections[HomeScreenSection.CONTILE_TOP_SITES] == true },
         featureFlag = FeatureFlags.contileFeature,
     )
 

nimbus.fml.yaml

@@ -18,7 +18,8 @@ features:
             "jump-back-in": true,
             "recently-saved": true,
             "recent-explorations": true,
-            "pocket": true
+            "pocket": true,
+            "contile-top-sites": false,
           }
     defaults:
       - channel: nightly
@@ -28,7 +29,8 @@ features:
             "jump-back-in": true,
             "recently-saved": true,
             "recent-explorations": true,
-            "pocket": true
+            "pocket": true,
+            "contile-top-sites": false,
           }
         }
   nimbus-validation:
@@ -84,6 +86,8 @@ types:
             description: The tab groups
           pocket:
             description: The pocket section. This should only be available in the US.
+          contile-top-sites:
+            description: The sponsored shortcuts in the homescreen.
     MessageSurfaceId:
         description: The identity of a message surface, used in the default browser experiments
         variants: