export users procedure generates an empty csv file if it is filter by custom field

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.2.X, 7.3.X, Master
• Fix Version/s: 7.1.X, 7.2.10 DXP FP12, 7.2.X, 7.3.10 DXP FP1, 7.3.10.1 DXP SP1, 7.3.6 CE GA7, 7.3.X, Master
• Component/s: User Management
• Labels:
  • ee-ts
  • liferay-dxp-73-sp1
  • liferay-fixpack-dxp-1-7310
  • liferay-fixpack-dxp-12-7210
• Branch Version/s:
  7.3.x, 7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Sprint: U&SM| 21 Sprint 3|2.16-3.9
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/98838

The export users procedure if filter by custom field generates an empty csv file.

Steps to reproduce:

1. Create a user custom field:
   1. Control panel -> Configuration -> Custom Field
   2. Select User -> Dropdown type
   3. For example:
      1. Field name: Gender
      2. Data type: Text
      3. Values:
         Male
         Female
         Neutral
2. Create a new user test1 with the custom field "Male"
3. At the user list, search for "Male"
4. You will see the created user test1
5. Click on Export Users

Expected behaviour:
CSV file with the test1 user

Actual behaviour:
The CSV file is empty