Fix search non-indexable update

- When creating preference conotrollers, if one fail, skip that one
  instead of giving up entire operation.
- Fix BatterySaverController by providing a existing looper.

Change-Id: Iefe443b7fa91e51515c5c247fab4d9588867baef
Fixes: 73903739
Test: robotest

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

@@ -25,7 +25,6 @@ import android.os.BatteryStats;
 import android.os.Bundle;
 import android.provider.SearchIndexableResource;
 import android.support.annotation.VisibleForTesting;
-import android.support.v7.preference.Preference;
 import android.support.v7.preference.PreferenceGroup;
 import android.text.format.Formatter;
 import android.util.SparseArray;
@@ -33,17 +32,14 @@ import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.View.OnClickListener;
 import android.view.View.OnLongClickListener;
 import android.widget.TextView;
 
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.R;
-import com.android.settings.Settings.HighPowerApplicationsActivity;
 import com.android.settings.SettingsActivity;
 import com.android.settings.Utils;
 import com.android.settings.applications.LayoutPreference;
-import com.android.settings.applications.manageapplications.ManageApplications;
 import com.android.settings.dashboard.SummaryLoader;
 import com.android.settings.display.BatteryPercentagePreferenceController;
 import com.android.settings.fuelgauge.anomaly.Anomaly;
@@ -56,7 +52,6 @@ import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settingslib.core.AbstractPreferenceController;
 import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
 import com.android.settingslib.core.lifecycle.Lifecycle;
-
 import com.android.settingslib.utils.PowerUtil;
 import com.android.settingslib.utils.StringUtil;
 
@@ -242,11 +237,7 @@ public class PowerUsageSummary extends PowerUsageBase implements OnLongClickList
                 KEY_BATTERY_TIP, (SettingsActivity) getActivity(), this /* fragment */, this /*
                 BatteryTipListener */);
         controllers.add(mBatteryTipPreferenceController);
-        BatterySaverController batterySaverController = new BatterySaverController(context);
-        controllers.add(batterySaverController);
         controllers.add(new BatteryPercentagePreferenceController(context));
-
-        lifecycle.addObserver(batterySaverController);
         return controllers;
     }