New UI for controlling USB

Create a new UI for managing USB access control. This UI is implemented
as a transparent popup triggered by a persistent notification.

Delete the old UI for controlling this. It is no longer used.

Bug: 18905620
Change-Id: I54186961414447a9d37f68e946e1c167506170ae

res/menu/storage.xml

@@ -1,21 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2012 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.
--->
-
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
-    <item
-        android:id="@+id/storage_usb"
-        android:title="@string/storage_menu_usb" />
-</menu>

res/menu/storage_volume.xml

@@ -30,7 +30,4 @@
     <item
         android:id="@+id/storage_migrate"
         android:title="@string/storage_menu_migrate" />
-    <item
-        android:id="@+id/storage_usb"
-        android:title="@string/storage_menu_usb" />
 </menu>