media-session: disable bluez5 and pulse-bridge by default

Some distros don't patch this up which interferes with the pulseaudio
server.

Fixes #360

src/examples/media-session/media-session.c

@@ -2051,10 +2051,8 @@ static void do_quit(void *data, int signal_number)
 				"alsa-acp,"		\
 				"alsa-seq,"		\
 				"v4l2,"			\
-				"bluez5,"		\
 				"suspend-node,"		\
-				"policy-node,"		\
-				"pulse-bridge"
+				"policy-node"
 #define EXTRA_ENABLED		""
 #define EXTRA_DISABLED		""