[Panlingual] Improve and refactor revamped UI

- Remove useless file
 - Make Icon be able to scroll up and down

Bug: 226350483
Test: local test
Change-Id: I4564f432143e7e31ba5beff1dd32d7bc7764f9bf
(cherry picked from commit ded10f8e24)
Merged-In: I4564f432143e7e31ba5beff1dd32d7bc7764f9bf

res/layout/app_locale_picker.xml

@@ -1,33 +0,0 @@
-<?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.
--->
-
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:id="@+id/app_locale_detail_container"
-    android:orientation="vertical">
-
-    <FrameLayout
-        android:id="@+id/app_locale_detail"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"/>
-
-    <FrameLayout
-        android:id="@+id/app_locale_picker_with_region"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"/>
-
-</LinearLayout>