Added PowerOfFour algorithm in bitmanipulation

[Mansi5164]

• [ ] 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

[codecov-commenter]

Codecov Report

:x: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 78.33%. Comparing base (bb6385e) to head (07022c4).

Files with missing lines	Patch %	Lines
...com/thealgorithms/bitmanipulation/PowerOfFour.java	0.00%	5 Missing :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6980      +/-   ##
============================================
- Coverage     78.35%   78.33%   -0.02%     
  Complexity     6615     6615              
============================================
  Files           746      747       +1     
  Lines         22015    22020       +5     
  Branches       4320     4321       +1     
============================================
  Hits          17249    17249              
- Misses         4078     4083       +5     
  Partials        688      688              

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