Settings : Fix CustomScreenColor when picking an image

Change-Id: I510b562eb0e9fb9b558380db5c5d6e818ba17d12
[2/2] Profile: Remove screen lock mode
[2/2] Profile: Screen timeout
[2/2] Battery light: Add 100% charged level
[2/2] Buttons: Switch to last app
[2/2] Global actions: Mobile data
[2/2] Global actions: Wifi
[2/2] Quick pulldown: center
[2/2] Smart pulldown
[2/2] Volume panel timeout
[2/2] Low battery warning policy
[2/2] Recents clear all button
[2/2] Recents RAM bar
[2/2] Network traffic indicator
[2/2] Lockscreen notifications
[2/2] Floating window
[2/2] Hover