Implement more of copy2DRange*

Change-Id: Id6be481c4abc968df27e5bba1ed044262ec0f293
diff --git a/libs/rs/rsAllocation.h b/libs/rs/rsAllocation.h
index a8d086e..a160765 100644
--- a/libs/rs/rsAllocation.h
+++ b/libs/rs/rsAllocation.h
@@ -106,6 +106,8 @@
     }
 
     void upload2DTexture(bool isFirstUpload, const void *ptr);
+    void update2DTexture(const void *ptr, uint32_t xoff, uint32_t yoff,
+                         uint32_t lod, RsAllocationCubemapFace face, uint32_t w, uint32_t h);
 
 protected:
     ObjectBaseRef<const Type> mType;