Android: what does coreApp means in the manifest

Question

In the manifest, I saw on a code

<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">

What does coreApp mean?

Answer 1

coreApp="true" means that app will launch when specific boot mod enabled, maybe "Safe mode":

The system can successfully boot (though a little painfully) with only framework-res.apk, SettingsProvider.apk, SystemUI.apk, DefaultContainerService.apk, and Launcher2.apk set as core apps.

From Android Git Repository: https://android.googlesource.com/platform/frameworks/base/+/d2509fd83597595914ef0627685e917380863eb6%5E!/