[infrastructure] move infered nullness warnings to error and update EEA (#8949)

Signed-off-by: Jan N. Klug <jan.n.klug@rub.de>

bundles/org.openhab.binding.gpstracker/src/main/java/org/openhab/binding/gpstracker/internal/message/MessageUtil.java

@@ -51,7 +51,7 @@ public class MessageUtil {
     public LocationMessage fromJson(String json) {
         for (String pattern : PATTERNS) {
             Class<? extends LocationMessage> c = MESSAGE_TYPES.get(pattern);
-            if (json.matches(pattern)) {
+            if (c != null && json.matches(pattern)) {
                 return gson.fromJson(json, c);
             }
         }