Signal-Android/app/src/flipper/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools"
          package="org.thoughtcrime.securesms">

    <application
        android:name=".FlipperApplicationContext"
        tools:replace="android:name">

        <activity
            android:name="com.facebook.flipper.android.diagnostics.FlipperDiagnosticActivity"
            android:exported="true" />

    </application>

</manifest>