API Extension: Support for optionally specifying a map of extra request headers when specifying the uri of media data to be played.

related-to-bug: 2393577

Original change by Andrei Popescu <andreip@google.com>
diff --git a/media/libmediaplayerservice/MidiFile.h b/media/libmediaplayerservice/MidiFile.h
index 25d4a1b..4a60ece 100644
--- a/media/libmediaplayerservice/MidiFile.h
+++ b/media/libmediaplayerservice/MidiFile.h
@@ -30,7 +30,10 @@
                         ~MidiFile();
 
     virtual status_t    initCheck();
-    virtual status_t    setDataSource(const char* path);
+
+    virtual status_t    setDataSource(
+            const char* path, const KeyedVector<String8, String8> *headers);
+
     virtual status_t    setDataSource(int fd, int64_t offset, int64_t length);
     virtual status_t    setVideoSurface(const sp<ISurface>& surface) { return UNKNOWN_ERROR; }
     virtual status_t    prepare();