MT#55283 Break circular dependency sdp.h/call.h

Break circular dependency chain introduced by:
0a20da45ed

Change-Id: I64c7714ec46d4fcb08a4a532c8169d497d533e77

include/call.h

@@ -311,7 +311,6 @@ enum block_dtmf_mode {
 #include "bencode.h"
 #include "crypto.h"
 #include "dtls.h"
-#include "sdp.h"
 #include "dtmf.h"