Create icon app chip menu for overview tasks.

Fix: 257951354
Test: TaplTestsQuickstep
Test: TaplTestsSplitscreen
Flag: ENABLE_OVERVIEW_ICON_MENU
Change-Id: Id8a14b1970ae42bcc74e95419caeaf52ef63638b
diff --git a/res/drawable/icon_menu_background.xml b/res/drawable/icon_menu_background.xml
new file mode 100644
index 0000000..ec5f011
--- /dev/null
+++ b/res/drawable/icon_menu_background.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2023 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.
+-->
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
+    android:shape="rectangle">
+    <solid android:color="?androidprv:attr/materialColorSurfaceContainer" />
+    <corners android:radius="@dimen/dialogCornerRadius" />
+</shape>
\ No newline at end of file