Fix wrong position of cursor in OwnerInfoSettings

Bug:N/A
Test:Settings -> Security -> right settings icon of Screen lock
-> Lock screen message.
The cursor shows at the forefront of this EditText.

Change-Id: I86fe1bdbe78f700053e38b0cba4a5c8365af946e
Signed-off-by: tiansiming <tiansiming@xiaomi.com>