Bug 1498520 - Add missing header file to fix MinGW64 build. r=padenot

Differential Revision: https://phabricator.services.mozilla.com/D8558

--HG--
extra : moz-landing-system : lando

dom/media/MediaManager.cpp

@@ -7,6 +7,7 @@
 #include "MediaManager.h"
 
 #include "AllocationHandle.h"
+#include "AudioDeviceInfo.h"
 #include "MediaStreamGraph.h"
 #include "MediaTimer.h"
 #include "mozilla/dom/MediaStreamTrack.h"