Status bar clock and date customization (2/2)

Thanks SlimRoms for the codes
Based on this commit: https://github.com/SlimRoms/packages_apps_Settings/commit/312052742259b25edd583b58a10d2b973181b74d

Change-Id: Ib924fc2a5a52fdd71b3c9bab19122e7b779a8699