nicla_voice: fix Record_and_stream example on latest arduino-audio-tools lib

Author: facchinm

libraries/NDP/examples/Record_and_stream/Record_and_stream.ino

@@ -17,6 +17,7 @@
 #include "Arduino.h"
 #include "NDP.h"
 
+#undef abs
 #include "AudioTools.h"
 #include "AudioCodecs/CodecG722.h"
 
@@ -65,4 +66,4 @@ void loop() {
 
   NDP.extractData(data, &len);
   encoder.write(data, len);
-}
+}