feat(android): mirror React Native SDK Kotlin 2.0 detection

- Read kotlinVersion from rootProject.ext with fallback
- Check kotlinMajor version to conditionally load compose plugin
- Matches stripe-react-native implementation exactly
- Fixes Kotlin 2.0 compose compiler requirement

Author: programmeraditya

packages/stripe_android/android/build.gradle

@@ -2,10 +2,16 @@ group 'com.flutter.stripe'
 version '1.0-SNAPSHOT'
 
 buildscript {
-    ext.kotlin_version = '1.9.0'
+    def kotlin_version = rootProject.ext.has('kotlinVersion')
+        ? rootProject.ext.get('kotlinVersion')
+        : '1.9.0'
+
+    ext.kotlin_version = kotlin_version
     ext.stripe_version = '21.26.+'
     ext.compose_version = '1.5.1'
 
+    def kotlinMajor = kotlin_version.tokenize('\\.')[0].toInteger()
+
     repositories {
         google()
         mavenCentral()
@@ -14,6 +20,10 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:8.1.3'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        // only use compose-compiler plugin when Kotlin >= 2.0
+        if (kotlinMajor >= 2) {
+            classpath "org.jetbrains.kotlin:compose-compiler-gradle-plugin:$kotlin_version"
+        }
     }
 }
 
@@ -24,8 +34,17 @@ rootProject.allprojects {
     }
 }
 
+def kotlin_version = rootProject.ext.has('kotlinVersion')
+    ? rootProject.ext.get('kotlinVersion')
+    : '1.9.0'
+def kotlinMajor = kotlin_version.tokenize('\\.')[0].toInteger()
+
 apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
+// Only apply compose plugin if Kotlin >= 2.0
+if (kotlinMajor >= 2) {
+    apply plugin: 'org.jetbrains.kotlin.plugin.compose'
+}
 
 android {
     namespace 'com.flutter.stripe'