ndk data source: add close API

Bug: 63934228
Change-Id: I4d5f0d6d6bee22d9ef61b85343beffa9e8bd5e74
diff --git a/media/ndk/NdkMediaDataSourcePriv.h b/media/ndk/NdkMediaDataSourcePriv.h
index a1cb331..65ddd2a 100644
--- a/media/ndk/NdkMediaDataSourcePriv.h
+++ b/media/ndk/NdkMediaDataSourcePriv.h
@@ -47,6 +47,7 @@
     virtual status_t getSize(off64_t *);
     virtual String8 toString();
     virtual String8 getMIMEType() const;
+    virtual void close();
 
 private: