Combine system apps to one item in the battery usage app list.

Bug: 262952385
Test: 262952385
Test: maunal
Change-Id: I078677b13a22f5e2f8f194bb5d5259f8c54c6b1e

src/com/android/settings/fuelgauge/PowerUsageFeatureProvider.java

@@ -22,6 +22,7 @@ import android.util.SparseIntArray;
 
 import com.android.settingslib.fuelgauge.Estimate;
 
+import java.util.List;
 import java.util.Set;
 
 /**
@@ -34,6 +35,11 @@ public interface PowerUsageFeatureProvider {
      */
     boolean isBatteryUsageEnabled(Context context);
 
+    /**
+     * Returns an allowlist of app names combined into the system-apps item
+     */
+    List<String> getSystemAppsAllowlist(Context context);
+
     /**
      * Check whether location setting is enabled
      */