unhide renderscript

Change-Id: I44dd19aec0a994316da22ea8bea01b9962f54680

api update

Change-Id: I77f5365b8b7a919cd572ceb65a9ab3871b9495d0
diff --git a/graphics/java/android/renderscript/Matrix2f.java b/graphics/java/android/renderscript/Matrix2f.java
index 6aa7d1b..2fffe8c 100644
--- a/graphics/java/android/renderscript/Matrix2f.java
+++ b/graphics/java/android/renderscript/Matrix2f.java
@@ -21,7 +21,7 @@
 
 
 /**
- * @hide
+ * Class for exposing the rs_matrix2x2 type back to java applications.
  *
  **/
 public class Matrix2f {