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/include/media/PVPlayer.h b/include/media/PVPlayer.h
index 8a66152..df50981 100644
--- a/include/media/PVPlayer.h
+++ b/include/media/PVPlayer.h
@@ -38,7 +38,10 @@
     virtual             ~PVPlayer();
 
     virtual status_t    initCheck();
-    virtual status_t    setDataSource(const char *url);
+
+    virtual status_t    setDataSource(
+            const char *url, 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);
     virtual status_t    prepare();