Enable core library desugaring for flutter_local_notifications

Add desugaring dependency and enable isCoreLibraryDesugaringEnabled
to resolve flutter_local_notifications build requirement.

android/app/build.gradle.kts

@@ -13,6 +13,7 @@ android {
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_17
         targetCompatibility = JavaVersion.VERSION_17
+        isCoreLibraryDesugaringEnabled = true
     }
 
     kotlinOptions {
@@ -30,6 +31,10 @@ android {
         versionName = flutter.versionName
     }
 
+    dependencies {
+        coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.0.4")
+    }
+
     buildTypes {
         release {
             // TODO: Add your own signing config for the release build.