title: Android: what does coreApp means in the manifest
body: <p>In the manifest, I saw on a code</p>
  
  <pre><code>&lt;manifest xmlns:tools="http://schemas.android.com/tools"
      package="com.example.test"
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:versionCode="1"
      android:versionName="1.0"
      android:sharedUserId="android.uid.system"
      coreApp="true"&gt;
  </code></pre>
  
  <p>What does coreApp mean?</p>