Destroy Allocation with ScriptIntrinsicLut

Bug: 28053584

On destroying the intrinsic, destroy its contained Allocation right away.

Test: CTS on x86_64 emulator
Change-Id: I5ca0da33b620c3291b7cafda31a6cc83eb7461a0

rs/java/android/renderscript/ScriptIntrinsicLUT.java

@@ -56,6 +56,10 @@ public final class ScriptIntrinsicLUT extends ScriptIntrinsic {
 
     }
 
+    public void destroy() {
+        mTables.destroy();
+        super.destroy();
+    }
 
     private void validate(int index, int value) {
         if (index < 0 || index > 255) {