Begin transition from BatteryStatsHelper to BatteryUsageStats API.

For now, keep both BatteryStatsHelper and BatteryUsageStats in play.
The plan is to transition from the former to the latter, one usage
at a time.  When all is said and done, all references to
BatteryStatsHelper will be gone.

Bug: 173745486
Test: atest --host SettingsRoboTests

Change-Id: I37e1dfff0043b1845992f18d72067bb547bb69ff

src/com/android/settings/applications/appinfo/AppInfoDashboardFragment.java

@@ -95,6 +95,7 @@ public class AppInfoDashboardFragment extends DashboardFragment
     static final int LOADER_CHART_DATA = 2;
     static final int LOADER_STORAGE = 3;
     static final int LOADER_BATTERY = 4;
+    static final int LOADER_BATTERY_USAGE_STATS = 5;
 
     public static final String ARG_PACKAGE_NAME = "package";
     public static final String ARG_PACKAGE_UID = "uid";