[2/2] OmniGears: custom header image provider

reads image uri and saves it in the file custom_file_header_image
in /data/user_de/0/com.android.systemui/files/file_header_image
must be copied else loading on reboot will fail cause storage
may not be mounted

Change-Id: I1304f686102924275fa6ecdbc369e55df82987c3
diff --git a/res/values/custom_arrays.xml b/res/values/custom_arrays.xml
index a3c062b..3601e49 100644
--- a/res/values/custom_arrays.xml
+++ b/res/values/custom_arrays.xml
@@ -285,11 +285,13 @@
     <string-array name="custom_header_provider_entries" translatable="false">
         <item>@string/daylight_header_provider_title</item>
         <item>@string/static_header_provider_title</item>
+        <item>@string/file_header_provider_title</item>
     </string-array>
 
     <string-array name="custom_header_provider_values" translatable="false">
         <item>@string/daylight_header_provider</item>
         <item>@string/static_header_provider</item>
+        <item>@string/file_header_provider</item>
     </string-array>
 
     <!-- Possible values for user theme in Display Settings.