MT#62063 session lvl sendrecv is active

Don't consider (global) session level sendrecv
state, in case of media section absence, as
the `InactiveStream`.

Keep it consistent with a logic for media sections:
sendrecv - means active RTP stream on this leg,
           hence no MoH to be provided.

Change-Id: I82f359823f69e7fc12835db1054d63621e7d1dad

apps/sbc/CallLeg.cpp

@@ -315,10 +315,8 @@ bool CallLeg::isHoldRequest(const AmSdp &sdp, holdMethod &method)
         case Recvonly:
           method = RecvonlyStream;
           return false; /* recvonly cannot provide moh */
-        /* well, no stream is something like InactiveStream, isn't it? */
         case Sendrecv:
-          method = InactiveStream;
-          break;
+          return false; /* media stream is active */
       }
     }
   }