Update SUW swipe home logic for taskbar stashing

- Reverted the previous change. It doesn't fix the issue when launching setup mode with command line. The fact that it looked as if it's fixed from factory reset might be a fluke
- Found out that we unstash the task bar to home from setup somewhere in TaskbarStashController. This is related to stashed alpha only.

Fixes: 337738795
Test: Finish setup, swipe home in folded, and observe home handle is visible.
Change-Id: I04daf41ae9a1c3b7e6e4962dd4a8c62b708e0a54
(cherry picked from commit b297d4fb)