Time for action – combining Intrinsics and scripts together

Let's improve our project to apply a new combined filter.

1. Add a new Combine Button in res/activity_renderscript.xml, as follows:

   <?xml version="1.0" encoding="utf-8"?>
   <LinearLayout
     xmlns:a="http://schemas.android.com/apk/res/android"
     a:layout_width="fill_parent" a:layout_height="fill_parent"
     a:layout_weight="1" a:orientation="vertical" >
     <LinearLayout 
       a:orientation="horizontal"
       a:layout_width="fill_parent" a:layout_height="wrap_content" >
       ...
       <Button a:"d="@+id/thresholdBut"on" a:te"t="Thresh"ld"
         a:layout_wid"h="wrap_cont"nt" a:layout_heig"t="wrap_cont"nt"/>
       <Button a:"d="@+id/combineBut"on" a:te"t="Comb"ne"
         a:layout_wid"h=&quot...