Add rounded corners to TaskMenu Items

<?xml version="1.0" encoding="utf-8"?>

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     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.

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          http://www.apache.org/licenses/LICENSE-2.0

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     distributed under the License is distributed on an "AS IS" BASIS,

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<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>

    <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"

    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

    <!--  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>