[Player Model] Fix notification permission compile error

[jkasten2]

Description

One Line Summary

Fix a compile error due to a syntax error introduced in PR #1848.

Details

Also cleaned up some warnings related to an unneeded annotation and scoping to private.

Motivation

Fix compile error so we can release the fix from PR #1848 and so future release can be made.

Scope

Only fixing issues related to NotificationPermissionController.supportsNativePrompt.
Fixes #1930

Testing

Unit testing

Manual testing

Tested on Android 14 emulator, ensure it prompts for notifications.

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
  • pre-existing test failure "uses-sdk:minSdkVersion 17 cannot be smaller than version 19 declared in library [com.google.firebase:firebase-messaging:23.0.0]"
• 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