Refactor all_apps.xml contents to  all_apps_content.xml

We can reuse the all_apps_content.xml in other all_apps.xml
This is step1. As step2, I will refactor secondary_launcher.xml
and taskbar_all_apps.xml.

Bug: 204781396
Test: Manual

Change-Id: Ia842ca082ec38220d327f512221807ed21ad2ad3
diff --git a/res/layout/all_apps.xml b/res/layout/all_apps.xml
index d0d82d4..f8a871a 100644
--- a/res/layout/all_apps.xml
+++ b/res/layout/all_apps.xml
@@ -25,34 +25,5 @@
     android:focusable="false"
     android:saveEnabled="false">
 
-    <include
-        layout="@layout/all_apps_bottom_sheet_background"
-        android:visibility="gone" />
-
-    <include
-        layout="@layout/search_results_rv_layout"
-        android:visibility="gone" />
-
-    <include
-        layout="@layout/all_apps_rv_layout"
-        android:visibility="gone" />
-
-    <com.android.launcher3.allapps.FloatingHeaderView
-        android:id="@+id/all_apps_header"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:clipToPadding="false"
-        android:paddingTop="@dimen/all_apps_header_top_padding"
-        android:paddingBottom="@dimen/all_apps_header_bottom_padding"
-        android:orientation="vertical" >
-
-        <include layout="@layout/floating_header_content" />
-
-        <include layout="@layout/all_apps_personal_work_tabs" />
-
-    </com.android.launcher3.allapps.FloatingHeaderView>
-
-    <include layout="@layout/search_container_all_apps" />
-
-    <include layout="@layout/all_apps_fast_scroller" />
+    <include layout="@layout/all_apps_content" />
 </com.android.launcher3.allapps.LauncherAllAppsContainerView>
\ No newline at end of file
diff --git a/res/layout/all_apps_content.xml b/res/layout/all_apps_content.xml
new file mode 100644
index 0000000..b33029f
--- /dev/null
+++ b/res/layout/all_apps_content.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?><!-- Copyright (C) 2022 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.
+-->
+<!-- This file is used by multiple all_apps.xml. Layout consists of all contents
+     showed in all apps screen
+-->
+<merge xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <include
+        layout="@layout/all_apps_bottom_sheet_background"
+        android:visibility="gone" />
+
+    <include
+        layout="@layout/search_results_rv_layout"
+        android:visibility="gone" />
+
+    <include
+        layout="@layout/all_apps_rv_layout"
+        android:visibility="gone" />
+
+    <com.android.launcher3.allapps.FloatingHeaderView
+        android:id="@+id/all_apps_header"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:clipToPadding="false"
+        android:paddingTop="@dimen/all_apps_header_top_padding"
+        android:paddingBottom="@dimen/all_apps_header_bottom_padding"
+        android:orientation="vertical" >
+
+        <include layout="@layout/floating_header_content" />
+
+        <include layout="@layout/all_apps_personal_work_tabs" />
+
+    </com.android.launcher3.allapps.FloatingHeaderView>
+
+    <include layout="@layout/search_container_all_apps" />
+
+    <include layout="@layout/all_apps_fast_scroller" />
+
+</merge>
\ No newline at end of file