Check unmagnified coordinates to close notif guts

To determine whether touches are inside a notification view, use the
unmagnified coordinates since we aren't scaling the view's size.

Test: manual
  1. enable magnification a11y service
  2. look at notification shade with notifications
  3. magnify a notification
  4. longpress on notification to see its interruptive settings
  5. change the interruptive setting (observe the guts don't close
  instantly upon changing the option, so user is able to still apply new
  interruptive settings)
Test: atest NotificationSwipeHelperTest
Fixes: 146316350
Change-Id: I5ce20763f18412f33310ca5cc547debbe94dbe97