Add NumberAppearingOddTimes.java new Algorithm

[DarkMatter-999]

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

Adds the Algorithm 1 as in #5628

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.61%. Comparing base (f3b2a94) to head (0a786d1).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5633      +/-   ##
============================================
+ Coverage     58.58%   58.61%   +0.02%     
- Complexity     3746     3749       +3     
============================================
  Files           553      554       +1     
  Lines         15918    15922       +4     
  Branches       3029     3030       +1     
============================================
+ Hits           9325     9332       +7     
+ Misses         6195     6194       -1     
+ Partials        398      396       -2     

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[siriak]

Looks good, thanks!