Refactor: profile models

[ben-mathu]

Part of an ongoing code refactoring to move all models to a common models package.

Fixes #4782

Moved profile models to data.models package.

Tested debug on Pixel 4 (Emulator) with API level 30.

[codecov[bot]]

Codecov Report

Merging #4867 (5965612) into master (87b9648) will decrease coverage by 0.22%. The diff coverage is n/a.

:exclamation: Current head 5965612 differs from pull request most recent head 5552219. Consider uploading reports for the commit 5552219 to get more accurate results

@@             Coverage Diff              @@
##             master    #4867      +/-   ##
============================================
- Coverage     50.66%   50.44%   -0.23%     
+ Complexity     2231     2196      -35     
============================================
  Files           338      333       -5     
  Lines         15531    15460      -71     
  Branches       1358     1358              
============================================
- Hits           7869     7799      -70     
+ Misses         7079     7076       -3     
- Partials        583      585       +2     

Impacted Files	Coverage Δ
...fr/free/nrw/commons/mwapi/OkHttpJsonApiClient.java	16.20% <ø> (ø)
...ons/profile/achievements/AchievementsFragment.java	67.54% <ø> (ø)
...w/commons/profile/achievements/FeedbackResponse.kt	0.00% <ø> (ø)
...w/commons/profile/leaderboard/DataSourceClass.java	0.00% <ø> (ø)
...commons/profile/leaderboard/DataSourceFactory.java	0.00% <ø> (ø)
...mmons/profile/leaderboard/LeaderboardFragment.java	46.03% <ø> (ø)
...ns/profile/leaderboard/LeaderboardListAdapter.java	44.44% <ø> (ø)
.../profile/leaderboard/LeaderboardListViewModel.java	0.00% <ø> (ø)
...commons/profile/leaderboard/UserDetailAdapter.java	0.00% <ø> (ø)
...fr/free/nrw/commons/review/ReviewPagerAdapter.java	30.76% <0.00%> (-38.47%)	:arrow_down:
... and 16 more

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