[backport] Force set/unset keyboard focus
This is work around which control keyboard focus for some
applications on behalf of windowmanager or LayerManagerControl.
Cherry-picked from (guppy branch):
https://gerrit.automotivelinux.org/gerrit/gitweb?p=staging/xdg-launcher.git;a=commit;h=
415e5cbb5787aa0429558b5256bf912231297431
Change-Id: I8e73b3fd34c076d1023060dbeef7225eebb243ca
Original Author: wang_zhiqiang <wang_zhiqiang@dl.cn.nexty-ele.com>
Signed-off-by: Nick Diego Yamane <nick@igalia.com>