Fix damage for layers for projection receivers

 Bug: 16880228

Change-Id: I59ab760a21f49cc2cac0d8936b173cff292e6114
diff --git a/libs/hwui/AnimatorManager.h b/libs/hwui/AnimatorManager.h
index 2568121..0d177c5 100644
--- a/libs/hwui/AnimatorManager.h
+++ b/libs/hwui/AnimatorManager.h
@@ -40,7 +40,8 @@
     void addAnimator(const sp<BaseRenderNodeAnimator>& animator);
 
     void pushStaging(TreeInfo& info);
-    void animate(TreeInfo& info);
+    // Returns the combined dirty mask of all animators run
+    uint32_t animate(TreeInfo& info);
 
 private:
     RenderNode& mParent;