\Drupal\user\Plugin\views\filter\Roles::calculateDependencies breaks when using the empty/not empty operators

Problem/Motivation

Simple logic bug in calculate dependencies. When no roles are used in the filter, there are no dependencies.

Steps to reproduce:

1. From /admin/structure/views/add, create a view showing "Users" and click "Save and edit"
2. Add the User -> Roles filter (description text is "Roles that a user belongs to" as there are two User -> Roles filters...)
3. In the "Configure filter" dialog, select "Is one of" and select "Administrator" under "Options", click Apply
4. Edit the filter settings again, this time select either "Only has the 'authenticated user' role" or "Has roles in addition to 'authenticated user'" for empty and not-empty, respectively
5. Save the filter settings and save the view
6. Navigate to /admin/config/development/configuration/single/export and pull up the config for the view created in step #1

The export will show

dependencies:
  config:
    - user.role.administrator

which is incorrect. Note that unselecting the Administrator role will remove the config dependency.

Proposed resolution

Do not return any dependencies for empty/not-empty operators.

Remaining tasks

Add tests.

User interface changes

None.

API changes

None.

Data model changes

None.