Added Nova Launcher and Slim File Manager

Change-Id: I5e1c6aee22575cb6a0e1c0d85b1fdc1961198410
update 5.2.4

Change-Id: Iad3ec625c596ad81ab03aac6de7c00fb3de48948
selinux: New rw privileges for themes

- New theme_data_file context for files under /data/system/theme
- Permit systemserver to create files/dirs under /data/resource-cache
- Permit systemserver to create files/dirs under /data/system/theme

Change-Id: Id597fc20b477ea395a8631623f26a7edde280799