Added activity entity

modules/zencrm_entities/src/ActivityTranslationHandler.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Drupal\zencrm_entities;
+
+use Drupal\content_translation\ContentTranslationHandler;
+
+/**
+ * Defines the translation handler for activity.
+ */
+class ActivityTranslationHandler extends ContentTranslationHandler {
+
+  // Override here the needed methods from ContentTranslationHandler.
+
+}