fix: android example app build

Class 'kotlin.Unit' was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.8.0, expected version is 1.6.0.

Author: leotm

android/build.gradle

@@ -12,7 +12,6 @@ buildscript {
         classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:${safeExtGet('kotlinVersion')}")
         classpath("com.android.tools.build:gradle:7.0.4")
     }
-    ext.kotlinVersion = "${safeExtGet('kotlinVersion')}"
 }
 
 def getExtOrIntegerDefault(prop) {
@@ -59,6 +58,9 @@ apply plugin: 'kotlin-android'
 android {
     if (supportsNamespace()) {
         namespace "com.reactnativecommunity.webview"
+        buildFeatures {
+            buildConfig true
+        }
 
         sourceSets {
             main {
@@ -106,13 +108,3 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib:${safeExtGet('kotlinVersion')}"
     implementation "androidx.webkit:webkit:${safeExtGet('webkitVersion')}"
 }
-
-if (isNewArchitectureEnabled()) {
-    react {
-        jsRootDir = file("../src/")
-        libraryName = "rncwebview"
-        codegenJavaPackageName = "com.reactnativecommunity.webview"
-        codegenDir = new File(codegenPath)
-        reactNativeDir = new File(reactNativePath)
-    }
-}

example/android/build.gradle

@@ -8,11 +8,8 @@ buildscript {
     }
 
     dependencies {
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.0")
-        classpath("com.android.tools.build:gradle:7.0.4")
         getReactNativeDependencies().each { dependency ->
             classpath(dependency)
         }
     }
-    ext.kotlinVersion = "1.6.0"
 }

example/android/gradle.properties

@@ -42,4 +42,4 @@ newArchEnabled=false
 #ANDROID_NDK_VERSION=21.4.7075529
 
 # Version of Kotlin to build against.
-KOTLIN_VERSION=1.6.0
+# KOTLIN_VERSION=1.6.0