Player model - Add log listener debug feature

[jkasten2]

Description

One Line Summary

Add log listener debug feature, so it's possible for app developers to use this to send OneSignal device logs to their backend.

Details

Motivation

There was no way for app developer to capture logs from the OneSignal SDK, as you can't intercept Android's Log methods.

Scope

Only adds new functionally to get log entries from OneSignal.

Testing

Manual testing

Tested on an Android 15 Emulator, ensured log entries can be printed. Also tested throwables print correctly, with their full stack trace.

Affected code checklist

• Notifications
  • Display
  • Open
  • Push Processing
  • Confirm Deliveries
• Outcomes
• Sessions
• In-App Messaging
• REST API requests
• Public API changes
  • OneSignal.addLogListener(OneSignalLogEvent)
  • OneSignal.removeLogListener(OneSignalLogEvent)

Checklist

Overview

• I have filled out all REQUIRED sections above
• PR does one thing
  • If it is hard to explain how any codes changes are related to each other then it most likely needs to be more than one PR
• 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
  • player-model-main CI is broken currently
• 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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