upgrade gecko. gradle, deps

packages/flutter_tor/example/android/settings.gradle.kts

@@ -19,8 +19,8 @@ pluginManagement {
 
 plugins {
     id("dev.flutter.flutter-plugin-loader") version "1.0.0"
-    id("com.android.application") version "8.13.2" apply false
-    id("org.jetbrains.kotlin.android") version "2.3.21" apply false
+    id("com.android.application") version "9.2.1" apply false
+    id("org.jetbrains.kotlin.android") version "2.4.0" apply false
 }
 
 include(":app")