Fix an issue where swiping up on the bubble bar would take you home

Test: manual - enable bubble bar, have bubbles
             - open an app
             - swipe up on the bubble bar
             => observe that bubbles expand and you don't go home so
                the app below bubbles remains open
Bug: 276981866
Change-Id: I3e89f4486287376eaea3e3111704ce71799a2da4