Fix doc bug for object size.

Change-Id: I3c810abcb9734196bd8804a22efc010dd3a73291
diff --git a/rs/java/android/renderscript/Element.java b/rs/java/android/renderscript/Element.java
index 287b3f1..60ff996 100644
--- a/rs/java/android/renderscript/Element.java
+++ b/rs/java/android/renderscript/Element.java
@@ -114,7 +114,8 @@
      * MATRIX the three matrix types contain FLOAT_32 elements and are treated
      * as 32 bits for alignment purposes.
      *
-     * RS_* objects.  32 bit opaque handles.
+     * RS_* objects:  opaque handles with implementation dependent
+     * sizes.
      */
     public enum DataType {
         NONE (0, 0),