Frameworkification of kactivities and plasma-framework

[Ben Cooksley]

Hi all,

Can someone please frameworkify KActivities? The CI system needs this
due to a dependency loop.

The new KRunner framework depends on, among others plasma-framework,
which in turn depends on kactivities.

Previously both these two escaped the need to be fully fledged
frameworks, however as another framework now depends on them, they
need to be frameworkified - as they can't depend on KF5Umbrella.

Thanks,
Ben