It makes sense to have the Energy InfoCenter KCM in this repo, since
it is highly related, uses its resources and even gets invoked from
the battery applet. It also shares components with the mobile version,
so they can be more easily combined in the future
This is purely a repo switch for the module's code. The KCM will
still be shown in KInfoCenter
Additional commit
kcms: Move the two modules into a kcms/ folder
Now we have two KCMs in the repo, it makes sense to group them together in the repo tree under a common folder, similar to other repos.
Back at akademy I talked about this with @jpetso and @sitter who were in favor of this move, but let's better consult again
Pinging also @devinlin about the move of kcm_mobile to the kcms folder