Update calls to IInterface::asBinder()

to use the new static version.

Change-Id: I89a5988a0ac694ffc04d88cf939e8455bf925d4c
diff --git a/media/libmedia/IMediaDeathNotifier.cpp b/media/libmedia/IMediaDeathNotifier.cpp
index 10b4934..38e9ca0 100644
--- a/media/libmedia/IMediaDeathNotifier.cpp
+++ b/media/libmedia/IMediaDeathNotifier.cpp
@@ -104,7 +104,7 @@
     Mutex::Autolock _l(sServiceLock);
     sObitRecipients.clear();
     if (sMediaPlayerService != 0) {
-        sMediaPlayerService->asBinder()->unlinkToDeath(this);
+        IInterface::asBinder(sMediaPlayerService)->unlinkToDeath(this);
     }
 }