Add feature flag for suggestion/SettingsIntelligence integ.

Bug: 65065268
Test: robotests
Change-Id: I42e1f8b01d7b82de3b94bd77943a9a119adf5867

src/com/android/settings/dashboard/suggestions/SuggestionControllerMixin.java

@@ -26,6 +26,7 @@ import android.os.RemoteException;
 import android.service.settings.suggestions.ISuggestionService;
 import android.service.settings.suggestions.Suggestion;
 import android.support.annotation.VisibleForTesting;
+import android.util.FeatureFlagUtils;
 import android.util.Log;
 
 import com.android.settingslib.core.lifecycle.Lifecycle;
@@ -40,6 +41,8 @@ import java.util.List;
  */
 public class SuggestionControllerMixin implements LifecycleObserver, OnStart, OnStop {
 
+    @VisibleForTesting
+    static final String FEATURE_FLAG = "new_settings_suggestion";
     private static final String TAG = "SuggestionCtrlMixin";
     private static final boolean DEBUG = false;
 
@@ -49,6 +52,10 @@ public class SuggestionControllerMixin implements LifecycleObserver, OnStart, On
 
     private ISuggestionService mRemoteService;
 
+    public static boolean isEnabled() {
+        return FeatureFlagUtils.isEnabled(FEATURE_FLAG);
+    }
+
     public SuggestionControllerMixin(Context context, Lifecycle lifecycle) {
         mContext = context.getApplicationContext();
         mServiceIntent = new Intent().setComponent(
@@ -79,11 +86,6 @@ public class SuggestionControllerMixin implements LifecycleObserver, OnStart, On
         }
     }
 
-    public boolean isEnabled() {
-        // TODO: Set up feature flag
-        return true;
-    }
-
     /**
      * Get setting suggestions.
      */