Add dump log for BatteryTip.

Since BatteryTipLoader will dump all BatteryTips, so we only need
to add toString() for it.

Bug: 74246970
Test: RunSettingsRoboTests
Change-Id: I0a89c4ac06d107274d47f8b4b66867373c062c1b

src/com/android/settings/fuelgauge/batterytip/AppInfo.java

@@ -64,6 +64,12 @@ public class AppInfo implements Comparable<AppInfo>, Parcelable {
         dest.writeLong(screenOnTimeMs);
     }
 
+    @Override
+    public String toString() {
+        return "packageName=" + packageName + ",anomalyType=" + anomalyType + ",screenTime="
+                + screenOnTimeMs;
+    }
+
     public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
         public AppInfo createFromParcel(Parcel in) {
             return new AppInfo(in);