Fixing latency test for square button

App-to-recents via square button now generates an event (sysui_latency: [1,<latency>]) for latency tests.

Bug: 72967764
Test: atest google/perf/app-transition/sysui-latency-test
Change-Id: Iae9e3112ab28d98ec2c11111f259010692e7fc7a