Populate java objects with native data from a3d file.

Remove legacy constructor from programraster
Make a3d object creation synchronous

Change-Id: Ic7d7547cf6eee6f9a7c6e3ee12cd104e80056a7b

graphics/java/android/renderscript/Allocation.java

@@ -45,6 +45,16 @@ public class Allocation extends BaseObj {
         mID = id;
     }
 
+    @Override
+    void updateFromNative() {
+        mRS.validate();
+        int typeID = mRS.nAllocationGetType(mID);
+        if(typeID != 0) {
+            mType = new Type(typeID, mRS);
+            mType.updateFromNative();
+        }
+    }
+
     public Type getType() {
         return mType;
     }