Make contacts photo pickers compatible with new documents UI

The old contacts photo picker code was using unguaranteed behavior
(that Intent.GET_CONTENT would support MediaStore.EXTRA_OUTPUT) and this
caused it to not work anymore with the new document picker.

This CL changes all usages of files to instead use URIs.

Also, a FileProvider has been added to Contacts, to allow us to pass in
URI pointing to our private cache in intent.setClipData with
Intent.FLAG_GRANT_WRITE_URI_PERMISSION and Intent.FLAG_GRANT_READ_URI_PERMISSION
so we no longer have to reply on the MediaStore.EXTRA_OUTPUT being parsed
and supported. The use of the FileProvider also prevents unauthorized access
to temporary files during the caching process.

Bug: 10745342

Change-Id: Iaee3d7d112dd124a2f5596c4b9704ea75d3b3419

1 files changed, 20 insertions, 0 deletions

diff --git a/res/xml/file_paths.xml b/res/xml/file_paths.xml
new file mode 100644
index 000000000..294c0cbfc
--- /dev/null
+++ b/res/xml/file_paths.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2013 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>