Remove unecessary exported symbols from libhwui.so

Test: compiles and links
Bug: 150782769
Change-Id: Ib49c1bf914b6bfaad1fb29371115df7c9eec08d2
diff --git a/libs/hwui/RenderProperties.h b/libs/hwui/RenderProperties.h
index 24f6035..ef4cd1f 100644
--- a/libs/hwui/RenderProperties.h
+++ b/libs/hwui/RenderProperties.h
@@ -69,7 +69,7 @@
     CLIP_TO_CLIP_BOUNDS = 0x1 << 1,
 };
 
-class ANDROID_API LayerProperties {
+class LayerProperties {
 public:
     bool setType(LayerType type) {
         if (RP_SET(mType, type)) {
@@ -123,7 +123,7 @@
 /*
  * Data structure that holds the properties for a RenderNode
  */
-class ANDROID_API RenderProperties {
+class RenderProperties {
 public:
     RenderProperties();
     virtual ~RenderProperties();