Don't treat Recents as transient for all apps from overview.

This effectively means the active app is paused as soon as you
start going to Recents, which allows us to control the IME for
the transition to all apps.

Bug: 275132633
Test: Manual
Flag: ENABLE_ALL_APPS_FROM_OVERVIEW
Change-Id: Ie3edaf8b6c36e50071de4692c0c8c45e7e393833