Adds wave file LIST metadata chunk to audio recordings.

Note: the metadata chunk may be added multiple times over the life span
of an audio call, as additional metadata details are added.

src/main/java/io/github/dsheirer/channel/metadata/Metadata.java

@@ -63,6 +63,8 @@ public class Metadata
     protected Boolean mDoNotRecord;
     private Set<BroadcastChannel> mBroadcastChannels;
 
+    private long mTimestamp = System.currentTimeMillis();
+
 
     /**
      * Channel metadata.  Contains all attributes that reflect the state and current attribute values for a channel
@@ -82,6 +84,14 @@ public class Metadata
         mMetadataID = metadataID;
     }
 
+    /**
+     * Timestamp when this metadata was created
+     * @return milliseconds since epoch
+     */
+    public long getTimestamp()
+    {
+        return mTimestamp;
+    }
     /**
      * Unique string identifier for this metadata that is comprised of the channel ID and the primary TO address.
      *

src/main/java/io/github/dsheirer/channel/state/AlwaysUnsquelchedDecoderState.java

@@ -34,6 +34,7 @@ import java.util.concurrent.ScheduledExecutorService;
 public class AlwaysUnsquelchedDecoderState extends DecoderState
 {
     private final static Logger mLog = LoggerFactory.getLogger(AlwaysUnsquelchedDecoderState.class);
+    private static final String NO_SQUELCH = "No Squelch";
 
     private DecoderType mDecoderType;
     private String mChannelName;
@@ -82,7 +83,7 @@ public class AlwaysUnsquelchedDecoderState extends DecoderState
         {
             //Each time we're reset, set the PRIMARY TO attribute back to the channel name, otherwise we won't have
             //a primary ID for any audio produced by this state.
-            broadcast(new AttributeChangeRequest<String>(Attribute.PRIMARY_ADDRESS_TO, mChannelName));
+            broadcast(new AttributeChangeRequest<String>(Attribute.PRIMARY_ADDRESS_TO, NO_SQUELCH));
         }
     }
 
@@ -95,7 +96,7 @@ public class AlwaysUnsquelchedDecoderState extends DecoderState
     @Override
     public void start(ScheduledExecutorService executor)
     {
-        broadcast(new AttributeChangeRequest<String>(Attribute.PRIMARY_ADDRESS_TO, mChannelName));
+        broadcast(new AttributeChangeRequest<String>(Attribute.PRIMARY_ADDRESS_TO, NO_SQUELCH));
         broadcast(new DecoderStateEvent(this, Event.ALWAYS_UNSQUELCH, State.IDLE));
     }