Fix roaming on Apple platforms

[jjanowsk]

Recent refactoring of Apple packet processing accidentally broke roaming on those platforms. This fixes it.

[codecov]

Codecov Report

❌ Patch coverage is 95.89041% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.17%. Comparing base (a45a31d) to head (02a95a0).

Files with missing lines	Patch %	Lines
neptun/src/device/mod.rs	95.89%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #77      +/-   ##
==========================================
+ Coverage   73.02%   74.17%   +1.14%     
==========================================
  Files          20       20              
  Lines        4601     4673      +72     
==========================================
+ Hits         3360     3466     +106     
+ Misses       1241     1207      -34     

Flag	Coverage Δ
linux	76.52% <100.00%> (-0.08%)	⬇️
macos	63.28% <95.89%> (+5.91%)	⬆️

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