Add background activity action

Background activity action is designed for wakeup alarm anomaly.
This cl also change the parameter in anomaly action interface
from "packageName" to "anomaly"

Bug: 36921529
Test: RunSettingsRoboTests
Change-Id: Ibde69f351f81043641f228f0e74deaa2e230c08a

src/com/android/settings/fuelgauge/anomaly/AnomalyDialogFragment.java

@@ -87,7 +87,7 @@ public class AnomalyDialogFragment extends InstrumentedDialogFragment implements
         final AnomalyAction anomalyAction = mAnomalyUtils.getAnomalyAction(mAnomaly.type);
         final int metricsKey = getArguments().getInt(ARG_METRICS_KEY);
 
-        anomalyAction.handlePositiveAction(mAnomaly.packageName, metricsKey);
+        anomalyAction.handlePositiveAction(mAnomaly, metricsKey);
         lsn.onAnomalyHandled(mAnomaly);
     }