update android build

example/android/build.gradle

@@ -1,17 +1,13 @@
-buildscript {
-    ext.kotlin_version = '1.6.10'
-    repositories {
-        google()
-        mavenCentral()
-    }
-
-    dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.0'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-    }
-}
+import org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompile
 
 allprojects {
+    tasks.withType(AbstractKotlinCompile).configureEach {
+        kotlinOptions {
+            jvmTarget = "1.8"
+            apiVersion = "1.8"
+            languageVersion = "1.8"
+        }
+    }
     repositories {
         google()
         mavenCentral()
@@ -26,6 +22,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }