chore: Update example to latest flutter (#383)

* chore: Upgrade compileSdkVersion, targeSdkVersion and kotlinVersion

* chore: Upgrade gradle version

* chore: Fix incompatibility with Java 16

@@ -26,7 +26,7 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 31
+    compileSdkVersion 33
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
@@ -35,8 +35,8 @@ android {
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.example.example"
-        minSdkVersion 16
-        targetSdkVersion 31
+        minSdkVersion flutter.minSdkVersion
+        targetSdkVersion 33
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }

 buildscript {
-    ext.kotlin_version = '1.6.10'
+    ext.kotlin_version = '1.7.10'
     repositories {
         google()
         jcenter()
@@ -26,6 +26,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }

-org.gradle.jvmargs=-Xmx1536M
-android.useAndroidX=true
-android.enableJetifier=true
+org.gradle.jvmargs=-Xmx1536M \
+--add-exports=java.base/sun.nio.ch=ALL-UNNAMED \
+--add-opens=java.base/java.lang=ALL-UNNAMED \
+--add-opens=java.base/java.lang.reflect=ALL-UNNAMED \
+--add-opens=java.base/java.io=ALL-UNNAMED \
+--add-exports=jdk.unsupported/sun.misc=ALL-UNNAMED
+android.useAndroidX=true
\ No newline at end of file

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-all.zip