[TECHNICAL] Move unit tests from Bitrise to GitHub Actions

[joragua]

Related Issues

App: -

• Add changelog files for the fixed issues in folder changelog/unreleased. More info here
• Add feature to Release Notes in ReleaseNotesViewModel.kt creating a new ReleaseNote() with String resources (if required)

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QA

[Copilot]

Pull Request Overview

This PR migrates Android unit tests from Bitrise to GitHub Actions, streamlining the CI process.

• Added a new GitHub Actions workflow file to run unit tests on pull requests.
• Configured steps for checkout, JDK setup, Gradle setup, building, and testing.

[jesmrec]

the task run: ./gradlew testDebugUnitTest is not launching the unit tests in the main module of the app. As the default variant for the main module is Mdmdebug, we should add another task for these tests. CC @joragua.

[jesmrec]

Last commit fixed the problem and now all tests run OK.

Approved