Create AdaptiveMergeSort.java

[anant-jain01]

• 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

Attention: Patch coverage is 0% with 33 lines in your changes missing coverage. Please review.

Project coverage is 62.86%. Comparing base (1c978c5) to head (5e263ff).
Report is 42 commits behind head on master.

Files with missing lines	Patch %	Lines
...ava/com/thealgorithms/sorts/AdaptiveMergeSort.java	0.00%	33 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5727      +/-   ##
============================================
- Coverage     62.98%   62.86%   -0.12%     
- Complexity     4049     4051       +2     
============================================
  Files           569      570       +1     
  Lines         16056    16089      +33     
  Branches       3086     3091       +5     
============================================
+ Hits          10113    10115       +2     
- Misses         5525     5558      +33     
+ Partials        418      416       -2     

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[anant-jain01]

@alxkm
@yanglbme
@siriak
@vil02
@BamaCharanChhandogi
please check and merge the pr with the hacktoberfest accepted tag.....
thank you

[siriak]

Could you remove main and add some JUnit tests? (see https://github.com/TheAlgorithms/Java/tree/master/src/test/java/com/thealgorithms)

[anant-jain01]

@siriak can you please tell me how to do it?
do i need to create a new pr with a new file name and just the test?
or do i need to change my existing file??
Or am i wrong entirely?

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