Implement maximum sliding window algorithm

[konduri-lakshmi-prasanna]

• 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.
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• 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.
✅ Project coverage is 78.20%. Comparing base (2da0465) to head (3d08001).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #6946   +/-   ##
=========================================
  Coverage     78.20%   78.20%           
- Complexity     6563     6564    +1     
=========================================
  Files           743      743           
  Lines         21886    21886           
  Branches       4284     4284           
=========================================
+ Hits          17115    17116    +1     
  Misses         4087     4087           
+ Partials        684      683    -1     

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