Merge "Polish auto-enter-pip from landscape and split-screen" into sc-dev am: 005e269220 am: c3a9f0e75b am: 4b38eb6f95

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

Change-Id: Iaa16181537eea90b946558be67fad0653fc052f3