Galaxy Themes Service
com.samsung.android.themecenter
Runs at startup and allows you to apply themes from “com.samsung.android.themestore”. On some devices, it provides the built-in wallpaper images to the Theme Store.
It will enable itself if you disable it, so try uninstalling (may throw an error).
Has of lot of permissions (including INTERNET and INSTALL_PACKAGES) and connects to Samsung domains for analytics.