[ci] update actions to v4

[nan-li]

Description

Upgrade actions for CI due to deprecation.

Details

• Let's update all actions packages to v4. It looks like there is no other changes needed after bumping the version, as we have little additional configurations.
• The android-actions/setup-android is still on release v3 so keep the same

Motivation

Motivated by CI breaking, seen in the failure of this PR run
Also: See deprecation notice: https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/

Scope

CI

Testing

CI now success: https://github.com/OneSignal/OneSignal-Android-SDK/actions/runs/13062566604/job/36448678877?pr=2250

Affected code checklist

• Notifications
  • Display
  • Open
  • Push Processing
  • Confirm Deliveries
• Outcomes
• Sessions
• In-App Messaging
• REST API requests
• Public API changes

Checklist

Overview

• I have filled out all REQUIRED sections above
• PR does one thing
• Any Public API changes are explained in the PR details and conform to existing APIs

Testing

• I have included test coverage for these changes, or explained why they are not needed
• All automated tests pass, or I explained why that is not possible
• I have personally tested this on my device, or explained why that is not possible

Final pass

• Code is as readable as possible.
• I have reviewed this PR myself, ensuring it meets each checklist item

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This change is