Add record for anomaly detect request source and clean up unused function.

Bug: 315905559
Test: make RunSettingsGoogleRoboTests ROBOTEST_FILTER="com.google.android.settings.fuelgauge.*"
Change-Id: I21a13a7910b21b27aac58143bd41c77e87c71953

src/com/android/settings/fuelgauge/batteryusage/PowerUsageAdvanced.java

@@ -263,7 +263,9 @@ public class PowerUsageAdvanced extends PowerUsageBase {
                             FeatureFactory.getFeatureFactory().getPowerUsageFeatureProvider();
                     final PowerAnomalyEventList anomalyEventList =
                             powerUsageFeatureProvider.detectSettingsAnomaly(
-                                    getContext(), /* displayDrain= */ 0);
+                                    getContext(),
+                                    /* displayDrain= */ 0,
+                                    DetectRequestSourceType.TYPE_USAGE_UI);
                     mHandler.post(() -> onAnomalyDetected(anomalyEventList));
                 });
     }