updated gradle setup steps around specifying AGP version (#2372)

Author: MaikuB

Diff for: flutter_local_notifications/CHANGELOG.md

@@ -1,3 +1,7 @@
+## [17.2.1+2]
+
+*  Updated Gradle setup readme section around specifying AGP version to include link to Flutter documentation for apps that are using the declarative Plugin DSL syntax
+
 ## [17.2.1+1]
 
 * Fixed accidental change done in example app as part of 17.2.0 where it made use of `SCHEDULE_EXACT_ALARM` permission instead of `USE_EXACT_ALARM`

Diff for: flutter_local_notifications/README.md

@@ -202,7 +202,7 @@ dependencies {
 }
 ```
 
-Note that the plugin uses Android Gradle plugin 7.3.1 to leverage this functionality so to errr on the safe side, applications should aim to use the same version at a **minimum**. Using a higher version is also needed as at point, Android Studio bundled a newer version of the Java SDK that will only work with Gradle 7.3 or higher (see [here](https://docs.flutter.dev/release/breaking-changes/android-java-gradle-migration-guide) for more details). For a Flutter project, this is specified in `android/build.gradle` and the main parts would look similar to the following
+Note that the plugin uses Android Gradle plugin (AGP) 7.3.1 to leverage this functionality so to errr on the safe side, applications should aim to use the same version at a **minimum**. Using a higher version is also needed as at point, Android Studio bundled a newer version of the Java SDK that will only work with Gradle 7.3 or higher (see [here](https://docs.flutter.dev/release/breaking-changes/android-java-gradle-migration-guide) for more details). For a Flutter app usin the legacy `apply` script syntax, this is specified in `android/build.gradle` and the main parts would look similar to the following
 
 ```gradle
 buildscript {
@@ -214,6 +214,8 @@ buildscript {
     }
 ```
 
+If your app is using the new declarative Plugin DSL syntax, please refer to the Flutter documentation [here](https://docs.flutter.dev/release/breaking-changes/flutter-gradle-plugin-apply) where they document where the AGP version can be specified
+
 There have been reports that enabling desugaring may result in a Flutter apps crashing on Android 12L and above. This would be an issue with Flutter itself, not the plugin. One possible fix is adding the [WindowManager library](https://developer.android.com/jetpack/androidx/releases/window) as a dependency:
 
 ```gradle

Diff for: flutter_local_notifications/pubspec.yaml

@@ -2,7 +2,7 @@ name: flutter_local_notifications
 description: A cross platform plugin for displaying and scheduling local
   notifications for Flutter applications with the ability to customise for each
   platform.
-version: 17.2.1+1
+version: 17.2.1+2
 homepage: https://github.com/MaikuB/flutter_local_notifications/tree/master/flutter_local_notifications
 issue_tracker: https://github.com/MaikuB/flutter_local_notifications/issues