The list does not follow the UX dialog design doc in alert dialog.

Please refer the comment#1 at bug and there are change below
- the divider is 4dp
- the item's radius is different in the list.

Bug: 216233391
Test: manual test: check the UI
make RunSettingsRoboTests ROBOTEST_FILTER=SimListDialogFragmentTest (PASS)

Change-Id: I758d60202fcf477aeb49014e60b949e7ad08c082