#1506 Resolves multiple performance issues: tuner freezing after a period of run time, buffer overflows, degraded audio playback. (#1513)

-Reduces message and event histories per channel from 500 to 200.
-Resolves issue of tuner freezing due to cancelled USB transfer buffers not being resubmitted.
-Reworks the audio playback system to remove in-progress call preemption and remove thread locks which can cause glitchy behavior during audio playback.
-Updates audio outputs to also use single thread pool for processing audio segments.
-Updates MBECallSequenceConverter to batch convert MBE to WAV audio.
-Unifies recording filename prefixes across baseband, mbe and binary recordings.
-Resolves issue with registering heartbeat manager to dispatcher.
-Uses single-thread thread pools for Dispatcher to support batch & process to overcome context switching consistency issue in Windows.

Co-authored-by: Dennis Sheirer <dsheirer@github.com>

src/main/java/io/github/dsheirer/source/SourceEvent.java

@@ -52,7 +52,6 @@ public class SourceEvent
         REQUEST_FREQUENCY_CHANGE,
         REQUEST_FREQUENCY_ROTATION,
         REQUEST_FREQUENCY_SELECTION,
-        REQUEST_SOURCE_DISPOSE,
         REQUEST_CHANGE_SQUELCH_THRESHOLD,
         REQUEST_CURRENT_SQUELCH_THRESHOLD,
         REQUEST_START_SAMPLE_STREAM,
@@ -368,15 +367,6 @@ public class SourceEvent
         return new SourceEvent(Event.NOTIFICATION_STOP_SAMPLE_STREAM, source);
     }
 
-    /**
-     * Creates a request to dispose of the source.  This is normally used for TunerChannelSource to notify the
-     * parent source manager that the channel is no longer needed
-     */
-    public static SourceEvent sourceDisposeRequest(Source source)
-    {
-        return new SourceEvent(Event.REQUEST_SOURCE_DISPOSE, source);
-    }
-
     /**
      * Creates a request to cycle to the next source frequency.  This is normally used for decoders to request the
      * next frequency in a list when a multiple-frequency source configuration is defined.