device_config: Add Google Photos to allowed cloud providers list

This allows the user to choose Google Photos as a media cloud provider
in Settings so that remote albums and photos are shown when the media
picker is invoked.

Change-Id: I793cb02509f2a1ead17120d49771b945784e84d4

overlay/common/packages/apps/SimpleDeviceConfig/res/values/config.xml

@@ -50,5 +50,8 @@
 
         <!-- Disable always screen on -->
         <item>attention_manager_service/keep_screen_on_enabled=false</item>
+
+        <!-- Media Provider -->
+        <item>mediaprovider/allowed_cloud_providers=com.google.android.apps.photos.cloudpicker</item>
     </string-array>
 </resources>