Replaced deprecated `kotlin-android-extensions with kotlin-parcelize`

References:
* https://developer.android.com/topic/libraries/view-binding/migration#groovy
* https://developer.android.com/kotlin/parcelize#groovy

app/build.gradle

@@ -4,7 +4,7 @@ plugins {
 
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
-apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-parcelize'
 apply plugin: 'kotlin-kapt'
 apply plugin: 'checkstyle'
 
@@ -84,11 +84,6 @@ android {
         jvmTarget = JavaVersion.VERSION_1_8
     }
 
-    // Required and used only by groupie
-    androidExtensions {
-        experimental = true
-    }
-
     sourceSets {
         androidTest.assets.srcDirs += files("$projectDir/schemas".toString())
     }