Merge "Polish auto-enter-pip from landscape and split-screen" into sc-dev am: 005e269220 am: b4a1448ae2

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

Change-Id: I8853abffe95a33dec942a69e92be5bc9579776d0