Hi Atul,
You already have the activity id option in the available fields of the search parameters. You just need to include that in your configuration. Try the following steps-
1) Copy the default configuration.
2) Display the available fields.
3)Get the Activity ID field into display zone.
4)Save the configuration.
Refer the following images for the same
Please try this out and let me know.
Regards,
Rachna