Ndk wrapper: wrap new Ndk datasource/extractor APIs

Bug: 63934228
Change-Id: Id6200b5b5be3c7fa22cfb0233f749fc0e8ef2bc4
diff --git a/media/ndk/NdkMediaDataSourcePriv.h b/media/ndk/NdkMediaDataSourcePriv.h
index a1cb331..7bb3a26 100644
--- a/media/ndk/NdkMediaDataSourcePriv.h
+++ b/media/ndk/NdkMediaDataSourcePriv.h
@@ -48,6 +48,9 @@
     virtual String8 toString();
     virtual String8 getMIMEType() const;
 
+protected:
+    virtual ~NdkDataSource();
+
 private:
 
     Mutex mLock;