Do not count private methods in detekt

Description

ApplicationApiImpl will be divided into separate classes to avoid LongClass which is part of codesmell. In this MR, Apps pages (App list & App detail page) related codes are separated.

Screenshots

Technical details

An interface AppsApi is introduced. AppsApiImpl implements this interface.

Tests

Issues

backlog/-/issues/1709: Subtask: backlog/-/work_items/1745

10 commandments of code reviews

👪 ❤ https://gitlab.e.foundation/internal/wiki/-/wikis/mobile-team/guidelines/Code-review