Fixing "SysUI - Recent Apps Fling" test

Someone broke the test about one week ago. Reflection started to fail
loading resetRecentsToBottom(). We noticed this today.

Bug: 72967764
Test: atest google/perf/jank/SystemUI/UbSystemUIJankTests:android.platform.systemui.tests.jank.SystemUiJankTests#testRecentAppsFling
Change-Id: Ifca115e16657cd89ae2c9fb1c3b18e0646697a31