Fixing NPE when "se:downloadsEnabled" not set

[Trigtrig]

Description

Fixes the NPE described in #13578. I'm using capabilities.is("se:downloadsEnabled") because this function already checks for possible null values and casts to boolean using Boolean.parseBoolean().

Motivation and Context

Fixes the NPE described in #13578.

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.

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b6b2096) 58.48% compared to head (5180adc) 58.48%.

❗ Current head 5180adc differs from pull request most recent head cb18a11. Consider uploading reports for the commit cb18a11 to get more accurate results

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Additional details and impacted files

@@           Coverage Diff           @@
##            trunk   #13583   +/-   ##
=======================================
  Coverage   58.48%   58.48%           
=======================================
  Files          86       86           
  Lines        5270     5270           
  Branches      220      220           
=======================================
  Hits         3082     3082           
  Misses       1968     1968           
  Partials      220      220           

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[diemol]

Thank you, @Trigtrig!