chore(tests): Update flaky badge clearing tests

[nan-li]

Description

One Line Summary

Update flaky badge clearing tests that have been consistently failing in CI.

Details

These two badge clearing tests have been consistently flaky, as the usage of UIApplication.shared.applicationIconBadgeNumber appears to be async so values are not accurate immediately. Additionally, this API and deprecated, and we have removed this usage from the SDK itself in #1568. These changes will also update the tests to match current behavior.

Motivation

Fix CI

Scope

Tests only

Testing

Unit testing

Updated 2 badge clearing tests

Manual testing

Affected code checklist

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

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