Add 'override' specifier to overridden destructor methods

Test: Build
Bug: 37752547
Change-Id: I157e1c2aa5d9d08fcab6055a3ca48c6ed8a050fc
diff --git a/include/gui/BufferQueueProducer.h b/include/gui/BufferQueueProducer.h
index 79e7af2..e1d0960 100644
--- a/include/gui/BufferQueueProducer.h
+++ b/include/gui/BufferQueueProducer.h
@@ -30,7 +30,7 @@
     friend class BufferQueue; // Needed to access binderDied
 
     BufferQueueProducer(const sp<BufferQueueCore>& core);
-    virtual ~BufferQueueProducer();
+    ~BufferQueueProducer() override;
 
     // requestBuffer returns the GraphicBuffer for slot N.
     //