The interface of homescreen service will be changed then,
use Event_ShowWindow instead of Event_TapShortcut.
Related changes:
agl-service-homescreen: https://gerrit.automotivelinux.org/gerrit/#/c/17929/
libhomescreen: https://gerrit.automotivelinux.org/gerrit/#/c/17931/
libqthomescreen: https://gerrit.automotivelinux.org/gerrit/#/c/17933/
BUG-AGL: SPEC-1931
Change-Id: I939d25ea1ca3f78cc18d3c8b4d119c76a77a1ef6
Signed-off-by: wang_zhiqiang <wang_zhiqiang@dl.cn.nexty-ele.com>