Support Surface and Layer Readback in the SkiaPipelines.

Test: CTS TextureViewTests and UIRendering
Change-Id: I2969c8f5a975bfd9aebcbb585c64d1fcbb2487c2
diff --git a/libs/hwui/renderthread/RenderProxy.cpp b/libs/hwui/renderthread/RenderProxy.cpp
index 39e5931..2c48242 100644
--- a/libs/hwui/renderthread/RenderProxy.cpp
+++ b/libs/hwui/renderthread/RenderProxy.cpp
@@ -602,8 +602,8 @@
 
 CREATE_BRIDGE4(copySurfaceInto, RenderThread* thread,
         Surface* surface, Rect srcRect, SkBitmap* bitmap) {
-    return (void*) Readback::copySurfaceInto(*args->thread,
-            *args->surface, args->srcRect, args->bitmap);
+    return (void*)args->thread->readback().copySurfaceInto(*args->surface,
+            args->srcRect, args->bitmap);
 }
 
 int RenderProxy::copySurfaceInto(sp<Surface>& surface, int left, int top,