Add waiting screen before PS setup completion

At the end of PS setup just before showing the final sucess screen this
change adds a new screen with loading layout which enables profile quiet
mode.
After enabling quiet mode checks if user is stopped before removing the
loading layout screen. Until user is stopped loading screen will be
shown.

Bug: 329042236
Bug: 328393532
Test: Manual verify new delay screen is shown
Change-Id: Iac3fd2f0f5c75a64719fbce32ff4dbfb533322d5

res/layout/private_space_pre_finish_delay.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2024 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<com.google.android.setupdesign.GlifLoadingLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/private_space_pre_finish"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:icon="@drawable/ic_private_space_icon"
+    app:sudUsePartnerHeavyTheme="true"
+    app:sudIllustrationType="default"
+    app:sucHeaderText="@string/private_space_pre_finish_title">
+</com.google.android.setupdesign.GlifLoadingLayout>