Create a new use case for listing available surveys

[shobhitagarwal1612]

Towards #3014

This PR aims at pulling out all logic related to compiling a list of surveys to be displayed to the user from SurveyRepositry to a new use case ListAvailableSurveysUseCase.

Also adds test coverage for the new use case.

[codecov]

Codecov Report

Attention: Patch coverage is 94.44444% with 1 line in your changes missing coverage. Please review.

Project coverage is 63.51%. Comparing base (040cbb5) to head (b0e364d).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...ain/usecases/survey/ListAvailableSurveysUseCase.kt	93.75%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3016      +/-   ##
============================================
+ Coverage     63.42%   63.51%   +0.09%     
- Complexity     1259     1262       +3     
============================================
  Files           269      270       +1     
  Lines          6551     6559       +8     
  Branches        928      929       +1     
============================================
+ Hits           4155     4166      +11     
+ Misses         1794     1789       -5     
- Partials        602      604       +2     

Files with missing lines	Coverage Δ
...ogle/android/ground/repository/SurveyRepository.kt	86.48% <ø> (+10.93%)	⬆️
...round/ui/surveyselector/SurveySelectorViewModel.kt	93.61% <100.00%> (ø)
...ain/usecases/survey/ListAvailableSurveysUseCase.kt	93.75% <93.75%> (ø)

... and 1 file with indirect coverage changes