Enable ivi-input-contoller.so in meta-agl-demo

Enable ivi-input-contoller.so in meta-agl-demo

This enable to deliver key events to applications running
on ivi-shell.

It requires ivi-input-controller.so and control keyboard
focus explicitly. For that, wayland-ivi-extension should be
configured with '-DWITH_ILM_INPUT=1' and built.

This patch is needed because of wayland-ivi-extension_*.bbappend
take over PACKAGECONFIG defined in wayland-ivi-extension.bb in
meta-agl.

Change-Id: Ie9664baa2cd10692b36790adf7cd0cca150fd35f
Signed-off-by: Tadao Tanikawa <tanikawa.tadao@jp.panasonic.com>