chore: Migrated to android gradle plugin

[utpal-barman]

General

Currently while running on the Android app, it's showing a message on the console to migrate to the Android Gradle Plugin block instead of the deprecated apply script method

You are applying Flutter's app_plugin_loader Gradle plugin imperatively using the apply script method, which is deprecated and will be removed in a future release. Migrate to applying Gradle plugins with the declarative plugins block: https://flutter.dev/go/flutter-gradle-plugin-apply

You are applying Flutter's main Gradle plugin imperatively using the apply script method, which is deprecated and will be removed in a future release. Migrate to applying Gradle plugins with the declarative plugins block: https://flutter.dev/go/flutter-gradle-plugin-apply

• Officlal Migration Guideline

Additionally The latest Flutter 3.19.5 • channel stable — suggests using the newer version of the Gradle version.

To migrate into the Gradle plugins with the declarative plugins block, android platform codes were regenerated by running the flutter create . platforms=android, so gradle versions were replaced by the latest flutter version.

⚠️ Blocker and Solution

Currently, there is a blocker to migrate this task, nstack plugin is using an old gradle version without a namespace field in android block, though it was overridden to overcome this issue

Checklists

• [x] Platform specific changes (input, image picking etc) are tested on both of the platforms (Android and iOS)
• [x] It is tested that the UI changes are rendered correctly on different device sizes (such as long lists or expanded rows) with safe area conditions.
• [x] Edge cases, such as responses being empty or invalid, missing data, no internet connection etc, are tested and the app works as expected.

Showcase

• [x] Either showcase screenshots / videos are attached, or this PR does not require such any showcase.

[nivisi]

Great call @utpal-barman. Regarding NStack, I think we should plan something for Pritam to perform the migration.

[hassan-saleh-ml]

@utpal-barman did you try to build an apk after these changes?

[utpal-barman]

@hassan-saleh-ml Yes I tried to build

To make sure again just tried now on this branch —

@nivisi Yes, updating NStack is a must now, I can see Hassan already opened a draft PR there https://github.com/nstack-io/flutter-sdk/pull/57