[Fix] Null pointer exception on opening notification with action buttons

[tanaynigam]

Description

One Line Summary

Fix null pointer exception on opening notifications with action buttons

Details

Motivation

Fixes bug where opening a notification with action buttons would sometimes cause a crash and throw a null pointer exception.

Scope

• Added a null check to the dictionary parameter actionButtonXam in the method NotificationToXam is null after converting NSObject actionButton to dictionary

Testing

Manual testing

• Tested opening notifications with action buttons on iOS device

Affected code checklist

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

Checklist

Overview

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

Final pass

• [x] 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.
• [x] 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.

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