fix(android): skip explicit Kotlin plugin when AGP registers the kotlin extension

Co-authored-by: Gabriel Donadel Dall'Agnol <donadeldev@gmail.com>

Author: wobsoriano

.changeset/agp9-built-in-kotlin.md

@@ -0,0 +1,6 @@
+---
+'@clerk/expo-google-signin': patch
+'@clerk/expo-passkeys': patch
+---
+
+Fix Android builds failing on Android Gradle Plugin 9 with `Cannot add extension with name 'kotlin'`.

packages/expo-google-signin/android/build.gradle

@@ -1,5 +1,9 @@
 apply plugin: 'com.android.library'
-apply plugin: 'kotlin-android'
+// AGP 9+ registers the `kotlin` extension itself, and applying kotlin-android on top of that fails configuration.
+if (project.extensions.findByName('kotlin') == null) {
+  apply plugin: 'kotlin-android'
+}
+
 apply plugin: 'maven-publish'
 
 group = 'expo.modules.clerk.googlesignin'

packages/expo-passkeys/android/build.gradle

@@ -1,5 +1,9 @@
 apply plugin: 'com.android.library'
-apply plugin: 'kotlin-android'
+// AGP 9+ registers the `kotlin` extension itself, and applying kotlin-android on top of that fails configuration.
+if (project.extensions.findByName('kotlin') == null) {
+  apply plugin: 'kotlin-android'
+}
+
 apply plugin: 'maven-publish'
 
 group = 'expo.modules.clerkexpopasskeys'