Unhide the storage attribution API with system visibility.

Bug: 179160886
Test: StorageStatsManagerLocalTest
Change-Id: I3a8994e215baff123df65d89d2d71b9e12de2af5
diff --git a/services/api/current.txt b/services/api/current.txt
index 475dcf5..50f0052 100644
--- a/services/api/current.txt
+++ b/services/api/current.txt
@@ -60,6 +60,20 @@
 
 }
 
+package com.android.server.usage {
+
+  public interface StorageStatsManagerLocal {
+    method public void registerStorageStatsAugmenter(@NonNull com.android.server.usage.StorageStatsManagerLocal.StorageStatsAugmenter, @NonNull String);
+  }
+
+  public static interface StorageStatsManagerLocal.StorageStatsAugmenter {
+    method public void augmentStatsForPackageForUser(@NonNull android.content.pm.PackageStats, @NonNull String, @NonNull android.os.UserHandle, boolean);
+    method public void augmentStatsForUid(@NonNull android.content.pm.PackageStats, int, boolean);
+    method public void augmentStatsForUser(@NonNull android.content.pm.PackageStats, @NonNull android.os.UserHandle);
+  }
+
+}
+
 package com.android.server.wifi {
 
   public class SupplicantManager {