Remove android:multiprocess from ShutdownActivity to ensure it runs in the system process.

        <activity android:name="com.android.server.ShutdownActivity"

            android:permission="android.permission.SHUTDOWN"

            android:excludeFromRecents="true"

            android:multiprocess="true">

            android:excludeFromRecents="true">

            <intent-filter>

                <action android:name="android.intent.action.ACTION_REQUEST_SHUTDOWN" />

                <category android:name="android.intent.category.DEFAULT" />