Fix hwuitask & RT priorities

 Bug: 15993695

Change-Id: Ib6f07237cb834e8d10f3074f8fb206d27f91859a
diff --git a/libs/hwui/thread/TaskManager.h b/libs/hwui/thread/TaskManager.h
index f2a216f..5a933ab 100644
--- a/libs/hwui/thread/TaskManager.h
+++ b/libs/hwui/thread/TaskManager.h
@@ -84,6 +84,7 @@
         void exit();
 
     private:
+        virtual status_t readyToRun();
         virtual bool threadLoop();
 
         // Lock for the list of tasks