Fix wrong position of cursor in IccLockSettings

Position of cursor goes to the front when submit
an error pin.

Bug:https://issuetracker.google.com/issues/67839176


Test:
1) Insert a sim card
2) Go to Settings -> Security -> Set up SIM card lock
3) press Lock SIM card checkbox
4) enter 123 and press OK button

Change-Id: I90655f3fa4cb3e4bda251cd0fc62e66300a4b66f
Signed-off-by: tiansiming <tiansiming@xiaomi.com>