title: How to open add contact page on android platform in flutter?
body: <p>I'm making an app using flutter that uses the contacts(using contact_services plugin) from user's phone. Thus it needs as well to give the ability to add a new contact using the system default add contact page. However there isn't such functionality in contacts_services. What is the way using plugin or existing contact_services plugin to open the add new contact page?</p>
  
  <pre><code>void openAddContacts() async{
  if (Platform.isAndroid) {
    final AndroidIntent intent = AndroidIntent(
      action: 'ContactsContract.Intents.Insert.ACTION',
      category: 'ContactsContract.RawContacts.CONTENT_TYPE',
    );
    await intent.launch();
   }
  }
  </code></pre>