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/Anomaly.java

@@ -42,9 +42,11 @@ public class Anomaly implements Parcelable {
     }
 
     @Retention(RetentionPolicy.SOURCE)
-    @IntDef({AnomalyActionType.FORCE_STOP})
+    @IntDef({AnomalyActionType.FORCE_STOP,
+            AnomalyActionType.BACKGROUND_CHECK})
     public @interface AnomalyActionType {
         int FORCE_STOP = 0;
+        int BACKGROUND_CHECK = 1;
     }
 
     @AnomalyType