Fixed an issue where cookies were not included when running on localhost

[jonsnyder]

Description

The change to drop IE support made a slight change in functionality. It caused localhost to be treated as using a first party collection domain.

• On localhost the apexDomain is set to ""
• Before dropping IE the test for first party domain was endsWith(endpointDomain, apexDomain). This returns false for endsWith("edge.adobedc.net", "")
• After dropping IE, the test for first party domain was endpointDomain.endsWith(apexDomain). This returns true for "edge.adobedc.net".endsWith("")

This change adds a check for an empty apexDomain.

Related Issue

https://jira.corp.adobe.com/browse/PDCL-12457

Motivation and Context

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (non-breaking change which does not add functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA or I'm an Adobe employee.
• I have made any necessary test changes and all tests pass.
• I have run the Sandbox successfully.

[dompuiu]

I approved it, but there is an error in Firefox where some cookies don't match.