Epic59 refactoring store api

Description

This epic branch is for refactoring the layer of app sources (Gplay/CleanApk). This MR represents the sum of following MRs:

• apps/-/merge_requests/279
• apps/-/merge_requests/286

Screenshots

Technical details

Tests

Issues

backlog/-/issues/1135
backlog/-/issues/1119
backlog/-/issues/1120

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