Added CloseGuard for BaseObj

Bug: 27719830

To turn on warnings, apps have to add to their Activity.onCreate() method
the following code.

        StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
                               .detectLeakedClosableObjects()
                               .penaltyLog()
                               .build());

For Slang generated ScriptC derived classes, we assume their
constructors won't throw exceptions after calling the ScriptC
constructor. In addition, ScriptIntrinsic derived classes do not seem
to throw exceptions in their constructors either. Therefore, we can
leave the guard.open() call in the Script constructor. This may be
only an approximation, but allows us to add CloseGuard for script
objects without making changes to slang.

Change-Id: I77ed45239a60b85af5c811dee6c124fb53da9060
(cherry picked from commit eb4dd08ec132f83745b8b28fa7da58eb4478b5b9)
diff --git a/rs/java/android/renderscript/ScriptGroup.java b/rs/java/android/renderscript/ScriptGroup.java
index 9357c3bb..219f16b 100644
--- a/rs/java/android/renderscript/ScriptGroup.java
+++ b/rs/java/android/renderscript/ScriptGroup.java
@@ -148,6 +148,8 @@
                                         fieldIDs, values, sizes, depClosures, depFieldIDs);
 
             setID(id);
+
+            guard.open("destroy");
         }
 
         Closure(RenderScript rs, Script.InvokeID invokeID,
@@ -181,6 +183,8 @@
                                               values, sizes);
 
             setID(id);
+
+            guard.open("destroy");
         }
 
         private void retrieveValueAndDependenceInfo(RenderScript rs,
@@ -382,6 +386,7 @@
 
     ScriptGroup(long id, RenderScript rs) {
         super(id, rs);
+        guard.open("destroy");
     }
 
     ScriptGroup(RenderScript rs, String name, List<Closure> closures,
@@ -398,6 +403,7 @@
         }
         long id = rs.nScriptGroup2Create(name, RenderScript.getCachePath(), closureIDs);
         setID(id);
+        guard.open("destroy");
     }
 
     /**