fix(android): migrate to built-in Kotlin

Author: rileychh

android/app/build.gradle.kts

@@ -1,4 +1,3 @@
-import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import java.util.Properties
 import java.io.FileInputStream
 
@@ -7,7 +6,6 @@ plugins {
     // START: FlutterFire Configuration
     // firebase plugins should be managed by the conditional apply below.
     // END: FlutterFire Configuration
-    id("kotlin-android")
     // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id("dev.flutter.flutter-gradle-plugin")
 }
@@ -72,12 +70,6 @@ if (isRelease) {
     apply(plugin = "com.google.firebase.crashlytics")
 }
 
-kotlin {
-    compilerOptions {
-        jvmTarget = JvmTarget.fromTarget("17")
-    }
-}
-
 dependencies {
     implementation("androidx.core:core-splashscreen:1.2.0")
     implementation(platform("com.google.firebase:firebase-bom:34.9.0"))

android/settings.gradle.kts

@@ -24,7 +24,6 @@ plugins {
     id("com.google.gms.google-services") version("4.4.2") apply false
     id("com.google.firebase.crashlytics") version("3.0.2") apply false
     // END: FlutterFire Configuration
-    id("org.jetbrains.kotlin.android") version "2.3.0" apply false
 }
 
 include(":app")