Fixed NPE for embedded files features data

[BezrukovM]

No description provided.

[codecov]

Codecov Report

Merging #951 into integration will increase coverage by <.01%.
The diff coverage is 0%.

@@                Coverage Diff                @@
##             integration     #951      +/-   ##
=================================================
+ Coverage          27.48%   27.49%   +<.01%     
  Complexity           944      944              
=================================================
  Files                174      174              
  Lines               7185     7183       -2     
  Branches            1104     1104              
=================================================
  Hits                1975     1975              
+ Misses              4946     4944       -2     
  Partials             264      264

Impacted Files	Coverage Δ	Complexity Δ
...in/java/org/verapdf/features/FontFeaturesData.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...org/verapdf/features/EmbeddedFileFeaturesData.java	0% <0%> (ø)	0 <0> (ø)	⬇️

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