display: directly set "false" to display.HasChanged.

Currently "Display.detectChanged" and "Display.apply" has
race condition which would case runtime panic.

tower: https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/0cef902f013940a5846382767a08ef25/

Change-Id: I01f6095a9ea31cea60e1cc32fb9fb98a5eda21c1