Add activity, file paths and fileProvider to manifest (AOSP)

This is similar to ag/862828 to enable sharing contacts using
background service.

Bug 26918008
Bug 26906732
Bug 22083005

Change-Id: I63e4e77d35d0584de6df9803c268abef45ef9e73
diff --git a/res/xml/file_paths.xml b/res/xml/file_paths.xml
new file mode 100644
index 0000000..45caed2
--- /dev/null
+++ b/res/xml/file_paths.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2016 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.
+-->
+
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Offer access to files under Context.getCacheDir() -->
+    <cache-path name="my_cache" />
+</paths>