When the switch controller was disabled by admin, we will show the
restricted info icon on it and when user click this icon, it should pop
a dialog to notify user current action not allowed.
This issue was caused by the solution of fixing the a11y view focus
issue b/124334500, it has been disabled the focusable and clickable
attributes of icon then to block the dialog showing.
Recover the focusable and clickable of restricted info icon to fix it.
Fixes: 136439565
Test: visual, robotests
Change-Id: I227add696870e07feca288073e90afa8e76954ee