#1067 P25 Phase 1 C4FM/LSM decoder redesign. (#2294)

C4FM now uses SIMD differential decoding and soft sync detection.
LSM updated with soft sync detector and retains original Gardner error detector.
Adds new QPSK symbol view in the now playing channel tab.
Restores PLL error driven tuner Auto-PPM feature.
Deletes the demod viewer GUI application and all instrumented decoders
Updates DMR to send soft symbols to new symbol view in Now Playing.

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

src/main/java/io/github/dsheirer/module/ProcessingChain.java

@@ -177,9 +177,9 @@ public class ProcessingChain implements Listener<ChannelEvent>
     {
         for(Module module : mModules)
         {
-            if(module instanceof PrimaryDecoder primaryDecoder)
+            if(module instanceof PrimaryDecoder decoder)
             {
-                return primaryDecoder;
+                return decoder;
             }
         }