Scrolling on the most recent task upon Overview start

Fixes this problem:
1. Open a single task in Recents
2. Dismiss via Clear-all
3. Start a task
4. Press Home
5. Press square button
get Recents revealing Clear All button

Bug: 79117932
Test: Manual
Change-Id: I47bcc50cb72f1757025d2abac0196460e0bb3f36