Closes #3027

[ashishkumar468]

Description (required)

Fixes #3027 Category search does not work properly [current master]

What changes did you make and why?
Concatenate category search with search with image title list and search all

Tests performed (required)

Tested ProdDebug on S7 with API level 27.

Screenshots showing what changed (optional - for UI changes)

[tests-checker]

Could you please add tests to make sure this change works as expected?

[codecov-io]

Codecov Report

Merging #3080 into 2.11-release will increase coverage by <.01%.
The diff coverage is 7.4%.

@@               Coverage Diff               @@
##           2.11-release   #3080      +/-   ##
===============================================
+ Coverage          4.41%   4.42%   +<.01%     
===============================================
  Files               259     259              
  Lines             12310   12335      +25     
  Branches           1056    1058       +2     
===============================================
+ Hits                544     546       +2     
- Misses            11727   11749      +22     
- Partials             39      40       +1

Impacted Files	Coverage Δ
.../free/nrw/commons/repository/UploadRepository.java	0% <0%> (ø)	⬆️
.../fr/free/nrw/commons/category/CategoriesModel.java	0% <0%> (ø)	⬆️
...nrw/commons/repository/UploadRemoteDataSource.java	0% <0%> (ø)	⬆️
...ns/upload/categories/UploadCategoriesFragment.java	0% <0%> (ø)	⬆️
...commons/upload/categories/CategoriesPresenter.java	72.58% <66.66%> (-0.31%)	⬇️

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[misaochan]

Thanks @ashishkumar468 !