Added ADFGVXCipher.java

[bennybebo]

• [x] I have read CONTRIBUTING.md.
• [x] This pull request is all my own work -- I have not plagiarized it.
• [x] All filenames are in PascalCase.
• [x] All functions and variable names follow Java naming conventions.
• [x] All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• [x] All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 78.87%. Comparing base (ddf7f86) to head (c309b0f). Report is 52 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #20292      +/-   ##
==========================================
+ Coverage   74.54%   78.87%   +4.33%     
==========================================
  Files         511      512       +1     
  Lines       48907    49266     +359     
  Branches     9006     7953    -1053     
==========================================
+ Hits        36460    38861    +2401     
+ Misses      10644     8546    -2098     
- Partials     1803     1859      +56     

Flag	Coverage Δ
keras	78.74% <ø> (+4.32%)	:arrow_up:
keras-jax	62.40% <ø> (+0.04%)	:arrow_up:
keras-numpy	57.42% <ø> (?)
keras-tensorflow	63.64% <ø> (+<0.01%)	:arrow_up:
keras-torch	62.37% <ø> (+0.03%)	:arrow_up:

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