feat: add custom events part 2

[fadi-george]

Description

One Line Summary

• adds custom events (trackEvent) logic and update example project to test new feature

Dashboard Logs

Emulators

Details

• adds trackEvent method that call internal sdk trackEvent method
• updates both sample apps to test trackEvent functionality
• added for java helpers (ToNativeConversion) to convert c# dictionary to a java hashmap

Motivation

Want to support custom events for all sdks.

Manual testing

Tested android and ios emulators/simulators. See screenshots.

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
  • 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
• I have personally tested this on my device, or explained why that is not possible

Final pass

• Code is as readable as possible.
  • Simplify with less code, followed by splitting up code into well named functions and variables, followed by adding comments to the code.
• I have reviewed this PR myself, ensuring it meets each checklist item
  • WIP (Work In Progress) is ok, but explain what is still in progress and what you would like feedback on. Start the PR title with "WIP" to indicate this.

[claude]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.