Updates channel state to ensure teardown processing is completed during

a call end and/or during a commanded stop.

src/main/java/io/github/dsheirer/source/tuner/channel/TunerChannelSource.java

@@ -300,6 +300,7 @@ public abstract class TunerChannelSource extends ComplexSource implements ISourc
 
                 mScheduledFuture = null;
 
+                getHeartbeatManager().broadcast();
                 performDisposal();
             }
         }