Implement voter reservation process

Add a "Find Voters" custom search to engage module with all address fields / filters from that of walk list report.
The custom search would allow volunteers to reserve one or more contacts from the result list to be reserved, with the help of task action - "reserve voters".

The action "reserve voters" will further require a survey to be specified, for which voters/contacts are being reserved. Successful completion of action would result in -
1. creating activity records with logged in contact / volunteer as assignee and voters as target contacts. Number of activity created will be equal to number of target contacts.
2. For every activity created above custom group - civicrm_value_survey_activity_details will also be filled with status id set to 'H' (held for pending interview).

The search should take care of showing only those records not already reserved.

Another task action could be - "release voters" which releases already held voters / constituents.