Don't send touches to PanelViewController when pulsing

Test: atest NotificationPanelViewControllerTest
Test: 1. Setup PIN security
  2. receive a pulsing notification when the display is off,
  3. swipe downward on the notification => see that it can expand
     to the notification shade
Test: 1. Setup PIN security
  2. Receive a pulsing notification when the display is off,
  3. Swipe down and up below the notification => see there are no
     bouncer or panel expansion changes
Test: 1. Setup face auth with BYPASS
  2. Receive a pulsing notification when the display is off
  3. Swipe downward anywhere on the display => see the notification
     shade expands, but other swipes (ie: up) don't bring up the bouncer
Test: Tests the above scenarios with "Sensitive notifications" NOT
   allowed.
Fixes: 236443196
Change-Id: I126b7d7cf7d60cfc3fece28b2c5d7c068fb39c39