Fixing testRecentAppsDismiss

Aka “SysUi: Recent App Dismiss” etc.

The fix works both with and without quickstep.

With quickstep, it will keep failing until Launcher implements
pressRecentApps() to show new overview.

Bug: 72967764
Test: atest google/perf/jank/SystemUI/UbSystemUIJankTests:android.platform.systemui.tests.jank.SystemUiJankTests#testRecentAppsDismiss
Change-Id: I85185e176f8a75b98441cf5e389dffdea5aeaf6a