Remove code that check for dashboard feature.

- remove DashboardFeatureProvider.isEnabled() and all relating code
and tests.

Bug: 35764802
Test: make RunSettingsRoboTests
Change-Id: If7796677abc8904b7436525836d50cdef38e37a4

src/com/android/settings/fuelgauge/PowerUsageSummary.java

@@ -733,10 +733,6 @@ public class PowerUsageSummary extends PowerUsageBase {
                 @Override
                 public List<SearchIndexableResource> getXmlResourcesToIndex(
                         Context context, boolean enabled) {
-                    if (!FeatureFactory.getFactory(context).getDashboardFeatureProvider(context)
-                            .isEnabled()) {
-                        return null;
-                    }
                     final SearchIndexableResource sir = new SearchIndexableResource(context);
                     sir.xmlResId = R.xml.power_usage_summary;
                     return Arrays.asList(sir);