build: update kotlin plugin

update kotlin version to 2.3.21
use org.jetbrains.kotlin.android
add aidl support

app/build.gradle

@@ -1,6 +1,8 @@
-apply plugin: 'com.android.application'
+plugins {
-apply plugin: 'kotlin-android'
+    id 'com.android.application'
-apply plugin: 'kotlin-kapt'
+    id 'org.jetbrains.kotlin.android'
+    id 'kotlin-kapt'
+}
 
 static def appName() {
     return "TTStdElderlyDialer"
@@ -87,6 +89,7 @@ android {
     buildFeatures {
         dataBinding true
         buildConfig true
+        aidl true
     }
 
     externalNativeBuild {

build.gradle

@@ -2,7 +2,7 @@
 apply from: "config.gradle"
 
 buildscript {
-    ext.kotlin_version = '2.2.21'
+    ext.kotlin_version = '2.3.21'
 
     repositories {
         google()