Remove unecessary exported symbols from libhwui.so

Test: compiles and links
Bug: 150782769
Change-Id: Ib49c1bf914b6bfaad1fb29371115df7c9eec08d2
diff --git a/libs/hwui/renderthread/CanvasContext.h b/libs/hwui/renderthread/CanvasContext.h
index 0f1b8ae..0306eec 100644
--- a/libs/hwui/renderthread/CanvasContext.h
+++ b/libs/hwui/renderthread/CanvasContext.h
@@ -170,9 +170,9 @@
     }
 
     // Used to queue up work that needs to be completed before this frame completes
-    ANDROID_API void enqueueFrameWork(std::function<void()>&& func);
+    void enqueueFrameWork(std::function<void()>&& func);
 
-    ANDROID_API int64_t getFrameNumber();
+    int64_t getFrameNumber();
 
     void waitOnFences();