Fix wrong-thread issue

Bug: 18259560

Change-Id: Ic63a86efba9c86f21defac0695a73db8b09ae284
diff --git a/libs/hwui/DeferredLayerUpdater.h b/libs/hwui/DeferredLayerUpdater.h
index dda3e89..84411ed 100644
--- a/libs/hwui/DeferredLayerUpdater.h
+++ b/libs/hwui/DeferredLayerUpdater.h
@@ -76,7 +76,7 @@
 
     ANDROID_API bool apply();
 
-    ANDROID_API Layer* backingLayer() {
+    Layer* backingLayer() {
         return mLayer;
     }