media: Update miracast code for U QPR2

Change-Id: Ib7c1f7fc5dcee1748763f9c0267414c4645769cd
diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 8af0a7a..3d5e9cb 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -536,7 +536,7 @@
         return NULL;
     }
 
-    return new RemoteDisplay(opPackageName, client, iface.string());
+    return new RemoteDisplay(opPackageName, client, iface.c_str());
 }
 
 status_t MediaPlayerService::AudioOutput::dump(int fd, const Vector<String16>& args) const