Handle rule exceptions

app/src/main/java/eu/faircode/email/ServiceSynchronize.java

@@ -2614,12 +2614,17 @@ public class ServiceSynchronize extends LifecycleService {
         }
 
         if (filter)
+            try {
                 for (EntityRule rule : rules)
                     if (rule.matches(context, message, imessage)) {
                         rule.execute(context, db, message);
                         if (rule.stop)
                             break;
                     }
+            } catch (Throwable ex) {
+                Log.e(ex);
+                db.message().setMessageError(message.id, Helper.formatThrowable(ex));
+            }
 
         return message;
     }