Finished initial implementation of StorageAccessDetails.

It still needs some polishing and unit tests, which will be added later.

Test: manual verification

Bug: 63720392

Change-Id: I8da1094aaaf4ebbe5d388021e859265091fd429c

res/xml/directory_access_details.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2018 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.
+-->
+
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:settings="http://schemas.android.com/apk/res-auto"
+        android:key="directory_access_details"
+        android:title="@string/directory_access"/>

res/xml/special_access.xml

@@ -111,7 +111,6 @@
             android:value="com.android.settings.Settings$VrListenersSettingsActivity" />
     </Preference>
 
-<!-- TODO(b/63720392): add when ready
     <Preference
         android:key="special_app_directory_access"
         android:title="@string/directory_access"
@@ -119,8 +118,7 @@
         settings:keywords="@string/keywords_directory_access">
         <extra
             android:name="classname"
-            android:value="com.android.settings.Settings$DirectoryeAccessSettingsActivity" />
+            android:value="com.android.settings.Settings$DirectoryAccessSettingsActivity" />
     </Preference>
- -->
 
 </PreferenceScreen>