Unpublish methods in class ScriptGroup.Binding

b/21187932

Made it an opaque class, since there is no need for a user to
inspect its fields after creation.

Change-Id: I9101afdecc5e25bb484d060be2a08c470faa92e5

rs/java/android/renderscript/ScriptGroup.java

@@ -851,13 +851,13 @@ public final class ScriptGroup extends BaseObj {
          * Returns the field ID
          */
 
-        public Script.FieldID getField() { return mField; }
+        Script.FieldID getField() { return mField; }
 
         /**
          * Returns the value
          */
 
-        public Object getValue() { return mValue; }
+        Object getValue() { return mValue; }
     }
 
     /**