Disconnect HTTP-based data source upon reset

Bug: 17425250

Change-Id: Ieb4c93fd9848489f9dbf35a36474376924fd8eb9
diff --git a/media/libmediaplayerservice/nuplayer/GenericSource.h b/media/libmediaplayerservice/nuplayer/GenericSource.h
index c70c48e..454edeb 100644
--- a/media/libmediaplayerservice/nuplayer/GenericSource.h
+++ b/media/libmediaplayerservice/nuplayer/GenericSource.h
@@ -55,6 +55,8 @@
     virtual void pause();
     virtual void resume();
 
+    virtual void disconnect();
+
     virtual status_t feedMoreTSData();
 
     virtual status_t dequeueAccessUnit(bool audio, sp<ABuffer> *accessUnit);