Cleanup and refactoring of an earlier cl.

Change-Id: I5e356ed88375a1620846e0c500659e3b7ead5030
diff --git a/libs/rs/rsAllocation.h b/libs/rs/rsAllocation.h
index 4a5f3da..44dce0d 100644
--- a/libs/rs/rsAllocation.h
+++ b/libs/rs/rsAllocation.h
@@ -29,7 +29,8 @@
     // The graphics equilivent of malloc.  The allocation contains a structure of elements.
 
 public:
-    Allocation(Context *rsc, const Type *, uint32_t usages);
+    Allocation(Context *rsc, const Type *, uint32_t usages,
+               RsAllocationMipmapControl mc = RS_ALLOCATION_MIPMAP_NONE);
 
     virtual ~Allocation();