Add back resources exported for external usage 2

These resources are not used by Settings, but is exported for external
usage by other apps.

Put them into res-export folder and add a README to prevent from
accidentally clean ups.

Bug: 234570979
Test: make Settings
Change-Id: Ia72cbde0b073ccb7624abeecb66e48d9c646f401

res-export/drawable/ic_find_device_enabled.xml

@@ -0,0 +1,25 @@
+<!--
+    Copyright (C) 2017 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.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <path
+        android:fillColor="#FF43A047"
+        android:pathData="M12,2C8.13,2 5,5.13 5,9c0,5.25 7,13 7,13s7,-7.75 7,-13C19,5.13 15.87,2 12,2zM7,9c0,-2.76 2.24,-5 5,-5s5,2.24 5,5c0,2.88 -2.88,7.19 -5,9.88C9.92,16.21 7,11.85 7,9zM14.5,9c0,1.38 -1.12,2.5 -2.5,2.5S9.5,10.38 9.5,9s1.12,-2.5 2.5,-2.5S14.5,7.62 14.5,9z"/>
+</vector>