Play workspace reveal animation for predictive back-to-home

Bug: 382453424
Test: Manual, i.e. tested back-to-home and back-to-allapps animation on phones, tablets and foldables, including interruptions.
Flag: com.android.launcher3.predictive_back_to_home_polish
Change-Id: I092a74ab2340828e18067ca15c7019c44d30f40b