Make PcapWriter's output directory configurable.

[JonathanLennox]

No description provided.

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (b227786) 44.22% compared to head (26b5de4) 44.22%.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2103      +/-   ##
============================================
- Coverage     44.22%   44.22%   -0.01%     
  Complexity     1939     1939              
============================================
  Files           340      340              
  Lines         18911    18914       +3     
  Branches       2612     2612              
============================================
  Hits           8364     8364              
- Misses         9678     9681       +3     
  Partials        869      869              

Files	Coverage Δ
...g/jitsi/nlj/transform/node/ToggleablePcapWriter.kt	0.00% <0.00%> (ø)
.../kotlin/org/jitsi/nlj/transform/node/PcapWriter.kt	0.00% <0.00%> (ø)

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