chore: migrate graddle , flutter and some dependencies

[berhili098]

This pull request includes several updates to the Android build configuration, Flutter plugin dependencies, and Dart SDK version requirements. The most important changes include updating the Gradle version, adding licensing information to Gradle wrapper scripts, and updating Dart SDK and dependency versions.

Gradle and Build Configuration Updates:

• android/gradle/wrapper/gradle-wrapper.properties: Updated Gradle distribution URL from version 6.5 to 7.2.
• android/gradlew: Added a comprehensive POSIX-compliant shell script for Gradle startup, including licensing information and configuration details.
• android/gradlew.bat: Added a Windows batch script for Gradle startup with licensing information and configuration details.

Flutter and Dart SDK Updates:

• example/.flutter-plugins-dependencies: Updated paths and metadata for the bluetooth_print plugin, reflecting new directory paths and updated version information.
• example/pubspec.yaml: Updated Dart SDK constraint to ">=3.0.0 <4.0.0" and updated cupertino_icons dependency version to ^1.0.8.
• pubspec.yaml: Updated Dart SDK constraint to ">=3.0.0 <4.0.0" and updated several dependencies including json_annotation, rxdart, build_runner, and json_serializable to their latest versions.…support