when fcitx is running, keyboard indicator show fcitx current lang code,
disbale system keyboard switch switch shotcut and hide system keyboard
layout in dde-control-center.
resume those after fcitx stopped.
Log: keyboard layout indicator adjust
Influence: plugins/keyboard-layout
Task: https://pms.uniontech.com/task-view-115107.html
Change-Id: Id717a681b4c0d21154602c7494900fc47f3a3a98