FIX: Value could not be determined statically.

[Jonah-Jordan]

This commit fixes the error Value could not be determined statically when DatepickerModule is imported with .forChild() for configuration purposes.

PR Checklist

This PR fulfills the following requirements:

• The commit message follows our guidelines: Contributing guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• A changelog entry was added

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• angular.io application / infrastructure changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

Resolved issues