Remove suggestion UI v1 codes.

- remove the check for feature flag for suggestion UI v2 and switch to
use the v2 codes.
- remove all code related to v1 of suggestion UI

Fixes: 70573674
Test: make RunSettingsRoboTests

Change-Id: I99ab318c1c0192508a9c5e9e708e86319120d55b

src/com/android/settings/dashboard/DashboardFeatureProviderImpl.java

@@ -217,11 +217,6 @@ public class DashboardFeatureProviderImpl implements DashboardFeatureProvider {
         launchIntentOrSelectProfile(activity, tile, intent, MetricsEvent.DASHBOARD_SUMMARY);
     }
 
-    @Override
-    public boolean useSuggestionUiV2() {
-        return FeatureFlagUtils.isEnabled(mContext, FeatureFlags.SUGGESTION_UI_V2);
-    }
-
     private void bindSummary(Preference preference, Tile tile) {
         if (tile.summary != null) {
             preference.setSummary(tile.summary);