Update calls to IInterface::asBinder()

to use the new static version.

Change-Id: Ia7b10eb38ca55b72278bfd33d3bf647f338b4e6a

Conflicts:
	media/libmedia/IAudioFlinger.cpp
	media/libmedia/IMediaPlayer.cpp
	media/libstagefright/CameraSource.cpp
diff --git a/media/libmedia/IAudioPolicyService.cpp b/media/libmedia/IAudioPolicyService.cpp
index 256cb3f..99fd525 100644
--- a/media/libmedia/IAudioPolicyService.cpp
+++ b/media/libmedia/IAudioPolicyService.cpp
@@ -571,7 +571,7 @@
     {
         Parcel data, reply;
         data.writeInterfaceToken(IAudioPolicyService::getInterfaceDescriptor());
-        data.writeStrongBinder(client->asBinder());
+        data.writeStrongBinder(IInterface::asBinder(client));
         remote()->transact(REGISTER_CLIENT, data, &reply);
     }