Add interstitial layout for larger screen devices

For large enough screens, always use the portrait (all vertical in one column) layout for the intestitial, since the landscape split in two halves only makes sense for smaller screens.

Renames the layout to mode_interstitial_layout_base and uses an alias so that we can reuse the same layout but with additional padding.

Fixes: 361344824
Test: manual
Flag: android.app.modes_ui
Change-Id: I4e02e9a246ee799e3a79508f11290397a236574c

res/layout-sw600dp/mode_interstitial_layout.xml

@@ -0,0 +1,28 @@
+<?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.
+  -->
+<FrameLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingHorizontal="80dp" >
+
+    <include
+        layout="@layout/mode_interstitial_layout_base"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_gravity="center_horizontal" />
+</FrameLayout>

res/values/aliases.xml

@@ -23,5 +23,6 @@
      <item name="fingerprint_enroll_finish" type="layout">@layout/fingerprint_enroll_finish_base</item>
      <item name="sfps_enroll_finish" type="layout">@layout/sfps_enroll_finish_base</item>
      <item name="choose_lock_pattern" type="layout">@layout/choose_lock_pattern_common</item>
+     <item name="mode_interstitial_layout" type="layout">@layout/mode_interstitial_layout_base</item>
 </resources>