GioActivity is final to avoid the brittle base class problem. However,
to permit replacement of GioActivity the GioView delegate methods must
be public.
While here fix a function signature, rename lowMemory to onLowMemory and make it
static. Also move view specific setup to GioView, simplifying the host
activity further.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Package wm (for "window manager") is a better fit for the package, and
distinguishes it from the low-level package windows for the Windows API.
Signed-off-by: Elias Naur <mail@eliasnaur.com>