Refactor: utils models

[ben-mathu]

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

Fixes #4782

Moved utils models to data.models package.

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

[codecov[bot]]

Codecov Report

Merging #4870 (03065b5) into master (0d25c24) will decrease coverage by 1.00%. The diff coverage is n/a.

:exclamation: Current head 03065b5 differs from pull request most recent head edb1cad. Consider uploading reports for the commit edb1cad to get more accurate results

@@             Coverage Diff              @@
##             master    #4870      +/-   ##
============================================
- Coverage     51.42%   50.41%   -1.01%     
+ Complexity     2327     2215     -112     
============================================
  Files           345      338       -7     
  Lines         16194    15546     -648     
  Branches       1430     1359      -71     
============================================
- Hits           8327     7837     -490     
+ Misses         7236     7124     -112     
+ Partials        631      585      -46     

Impacted Files	Coverage Δ
...java/fr/free/nrw/commons/utils/DeviceInfoUtil.java	77.77% <ø> (ø)
...n/java/fr/free/nrw/commons/utils/NetworkUtils.java	80.00% <ø> (ø)
...ain/java/fr/free/nrw/commons/auth/AccountUtil.java	83.33% <0.00%> (-16.67%)	:arrow_down:
...fr/free/nrw/commons/settings/SettingsFragment.java	41.17% <0.00%> (-16.04%)	:arrow_down:
.../nrw/commons/category/CategoryContentProvider.java	12.50% <0.00%> (-14.29%)	:arrow_down:
...w/commons/upload/categories/BaseDelegateAdapter.kt	35.29% <0.00%> (-11.77%)	:arrow_down:
...n/java/fr/free/nrw/commons/upload/UploadModel.java	25.58% <0.00%> (-11.57%)	:arrow_down:
...a/fr/free/nrw/commons/wikidata/WikiBaseClient.java	23.52% <0.00%> (-11.48%)	:arrow_down:
...ava/fr/free/nrw/commons/review/ReviewActivity.java	47.28% <0.00%> (-10.06%)	:arrow_down:
...r/free/nrw/commons/review/ReviewImageFragment.java	25.80% <0.00%> (-5.88%)	:arrow_down:
... and 30 more

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[neslihanturan]

Hi, is this PR sleeping @ben-mathu ?:)