Modify ripple for cancel button in search bar in widget picker.

Bug: 192186626
Test: Tested manually
Change-Id: Ifff98e03ad3647df7d8b273c4c3eb7cd688efbc3

res/drawable/full_rounded_transparent_ripple.xml

@@ -0,0 +1,26 @@
+<?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.
+-->
+
+<ripple
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:color="?android:attr/colorControlHighlight">
+    <item android:id="@android:id/mask">
+        <shape android:shape="oval">
+            <size android:height="24dp" android:width="24dp"/>
+            <solid android:color="@android:color/white"/>
+        </shape>
+    </item>
+</ripple>

res/layout/widgets_search_bar.xml

@@ -31,11 +31,9 @@
         android:id="@+id/widgets_search_cancel_button"
         android:layout_height="wrap_content"
         android:layout_width="wrap_content"
-        android:paddingVertical="12dp"
-        android:paddingStart="8dp"
-        android:paddingEnd="12dp"
+        android:padding="12dp"
         android:src="@drawable/ic_gm_close_24"
-        android:background="?android:selectableItemBackground"
+        android:background="@drawable/full_rounded_transparent_ripple"
         android:layout_gravity="center"
         android:contentDescription="@string/widgets_full_sheet_cancel_button_description"
         android:visibility="gone"/>