val defaultDisplay: Display is deprecated

### Environment

SaaS (https://sentry.io/)

### Steps to Reproduce

1. building Android application
2. get the warning:
```
SentryFlutterPlugin.kt:199:15: warning: 'val defaultDisplay: Display!' is deprecated. Deprecated in Java. exception: ?.defaultDisplay exception
```

### Expected Result

There is no warning

### Actual Result

```
exception: c:\Users\User\AppData\Local\Pub\Cache\hosted\pub.dev\sentry_flutter-9.16.0\android\src\main\kotlin\io\sentry\flutter\SentryFlutterPlugin.kt:199:15: warning: 'val defaultDisplay: Display!' is deprecated. Deprecated in Java.
exception: ?.defaultDisplay
exception: ^^^^^^^^^^^^^^
```

### Product Area

Other

### Link

_No response_

### DSN

_No response_

### Version

_No response_

Start in android/src/main/kotlin/io/sentry/flutter/SentryFlutterPlugin.kt at line 199 and reproduce the Android build warning from the issue. Check the deprecated defaultDisplay usage and verify the change by rebuilding the Android application; done means the warning no longer appears.

Written by the indexing model from the issue text.