Refactor jni logger and cache log level class

[codecov[bot]]

Codecov Report

Merging #89 (34f4f31) into main (f075447) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##               main      #89   +/-   ##
=========================================
  Coverage     69.84%   69.84%           
  Complexity       74       74           
=========================================
  Files            23       23           
  Lines           378      378           
  Branches          2        2           
=========================================
  Hits            264      264           
  Misses          108      108           
  Partials          6        6           

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