Merge "Polish auto-enter-pip from landscape and split-screen" into sc-dev am: 005e269220 am: 52df9c8580 am: 873319b273

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15132509

Change-Id: Ieaabde21fff22d14c41138137e4648a9372f3a14