Only run the wifi display RTSP server on demand, and only on the wifi direct

interface.

Change-Id: I7d3c44cb79cd40e73499f2d7ccf35c69b628e6d7
diff --git a/media/libmediaplayerservice/RemoteDisplay.h b/media/libmediaplayerservice/RemoteDisplay.h
index 6b37afb..3607d06 100644
--- a/media/libmediaplayerservice/RemoteDisplay.h
+++ b/media/libmediaplayerservice/RemoteDisplay.h
@@ -31,7 +31,7 @@
 struct RemoteDisplay : public RefBase {
     RemoteDisplay();
 
-    status_t start();
+    status_t start(const char *iface);
     status_t stop();
 
 protected: