fix type errors for input_device and file_detector

[Delta456]

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Description

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

PR for type errors for input_device.py and file_detector.py as seen in https://github.com/SeleniumHQ/selenium/actions/runs/10626264126/job/29457778562

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All committers have signed the CLA.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.68%. Comparing base (8fc4299) to head (d87ba2c).
Report is 1 commits behind head on trunk.

Additional details and impacted files

@@            Coverage Diff             @@
##            trunk   #14459      +/-   ##
==========================================
+ Coverage   57.65%   57.68%   +0.02%     
==========================================
  Files          89       89              
  Lines        5571     5579       +8     
  Branches      236      240       +4     
==========================================
+ Hits         3212     3218       +6     
+ Misses       2123     2121       -2     
- Partials      236      240       +4     

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[harsha509]

Thank you @Delta456 !

[harsha509]

Congratulations on your first contribution to Selenium @Delta456 🎉 🎉 🎉 !