Fix trackpad gesture not able to pull down notification

TouchInteractionService monitors motion events on the homescreen too. While we allow the motion event anywhere on the homescreen, they should not be intercepted by input consumers.

As a byproduct, this fixes pulling up the all apps panel too.

Bug: 255602235
Bug: 263200728
Test: manual
Change-Id: I3e74c4476505d530ff6d3443342a5c36c6faa9e5