BREAKING: Minimum Flutter version is now >=3.44.0 and Dart ^3.12.0.
(Users on Flutter < 3.44 should pin to proximity_sensor: ^1.3.10.)
- Migrates Android build to Flutter's Built-in Kotlin support, removing explicit Kotlin Gradle Plugin (KGP) application to ensure compatibility with AGP 9+ and avoid build warnings in Flutter 3.44+.
- Updates example app Gradle wrapper to 8.14.1, AGP to 8.11.1, and Kotlin to 2.2.20.