Fix logging of game-specific message

Use the message length instead of treating it as a null-terminated string

Author: jwbonner

akit/src/main/java/org/littletonrobotics/conduit/ConduitApi.java

@@ -82,9 +82,8 @@ public String getEventName() {
 
   public String getGameSpecificMessage() {
     int i;
-    for (i = 0; i < gameSpecificMessageBytes.length; i++) {
+    for (i = 0; i < getGameSpecificMessageSize(); i++) {
       gameSpecificMessageBytes[i] = (byte) ds.gameSpecificMessage(i);
-      if (gameSpecificMessageBytes[i] == 0) break;
     }
     return new String(gameSpecificMessageBytes, 0, i, utf8Charset);
   }