Add rounded corners to TaskMenu Items

Bug: 188168717
Test: Manual
Change-Id: I7cce42fb08f03a9689b4c5d56ed8208d6f60f7d7

quickstep/res/drawable/task_menu_item_bg.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2021 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">
+    <solid android:color="?android:attr/colorPrimary"/>
+    <corners android:radius="@dimen/task_menu_item_corner_radius"/>
+</shape>

quickstep/res/layout/task_menu.xml

@@ -25,7 +25,7 @@
 
     <TextView
         android:id="@+id/task_name"
-        android:background="?android:attr/colorPrimary"
+        android:background="@drawable/task_menu_item_bg"
         android:textColor="?android:attr/textColorPrimary"
         android:layout_width="match_parent"
         android:layout_height="match_parent"

quickstep/res/layout/task_view_menu_option.xml

@@ -21,7 +21,7 @@
     android:orientation="vertical"
     android:paddingTop="@dimen/task_card_menu_option_vertical_padding"
     android:paddingBottom="@dimen/task_card_menu_option_vertical_padding"
-    android:background="?android:attr/colorPrimary"
+    android:background="@drawable/task_menu_item_bg"
     android:theme="@style/PopupItem" >
 
     <View

quickstep/res/values/dimens.xml

@@ -24,6 +24,7 @@
 
     <!--  Task Menu View  -->
     <dimen name="task_menu_corner_radius">22dp</dimen>
+    <dimen name="task_menu_item_corner_radius">4dp</dimen>
     <dimen name="overview_proactive_row_height">48dp</dimen>
     <dimen name="overview_proactive_row_bottom_margin">16dp</dimen>