Move new script group API into ScriptGroup class

And mark existing methods and builder deprecated.
Removed ScriptGroup2 class.
Renamed nested class UnboundValue to Input.
Marked classes Closure, Future, and Input as final.

Change-Id: I362910c115e9d0173dc515674e08bf4878232879

rs/java/android/renderscript/Script.java

@@ -66,7 +66,6 @@ public class Script extends BaseObj {
     }
 
     /**
-     * @hide Pending API review
      * InvokeID is an identifier for an invoke function. It is used
      * as an identifier for ScriptGroup creation.
      *
@@ -86,7 +85,6 @@ public class Script extends BaseObj {
 
     private final SparseArray<InvokeID> mIIDs = new SparseArray<InvokeID>();
     /**
-     * @hide Pending API review
      * Only to be used by generated reflected classes.
      */
     protected InvokeID createInvokeID(int slot) {