SurfaceFlinger: Revert accidental change

An accidental change that was supposed to be reverted snuck in to a
large stack of CLs while they were being rebased/split-up.

Bug: 186200583
Test: Existing tests pass
Change-Id: I5694a18f491b3ac1f6464ddf6c14a245b5022208
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index b4d2505..ec9bb7c 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -996,7 +996,7 @@
     // This layer can be a cursor on some displays.
     bool mPotentialCursor{false};
 
-    LayerVector mCurrentChildren{LayerVector::StateSet::Drawing};
+    LayerVector mCurrentChildren{LayerVector::StateSet::Current};
     LayerVector mDrawingChildren{LayerVector::StateSet::Drawing};
 
     wp<Layer> mCurrentParent;