Support passing headers to MediaMetadataRetriever's setDataSource API

Change-Id: Ib1a5c08fc5034cac05034db27007a35c9b660b26
related-to-bug: 3506316
diff --git a/include/media/mediametadataretriever.h b/include/media/mediametadataretriever.h
index a5cb949..3e343e0 100644
--- a/include/media/mediametadataretriever.h
+++ b/include/media/mediametadataretriever.h
@@ -62,7 +62,11 @@
     MediaMetadataRetriever();
     ~MediaMetadataRetriever();
     void disconnect();
-    status_t setDataSource(const char* dataSourceUrl);
+
+    status_t setDataSource(
+            const char *dataSourceUrl,
+            const KeyedVector<String8, String8> *headers = NULL);
+
     status_t setDataSource(int fd, int64_t offset, int64_t length);
     sp<IMemory> getFrameAtTime(int64_t timeUs, int option);
     sp<IMemory> extractAlbumArt();