wallpapers/color: Add back "ServiceTypes" property in metadata.json
In containmentconfigview.cpp, "Plasma/Wallpaper" is checked if a plugin is of ServiceType Plasma/Wallpaper.
BUG: 448625 FIXED-IN: 5.24
Edited by Fushan Wen
In containmentconfigview.cpp, "Plasma/Wallpaper" is checked if a plugin is of ServiceType Plasma/Wallpaper.
BUG: 448625 FIXED-IN: 5.24