Merge "Add split_display device profile." into sc-dev am: 8acc1ad025 am: db36b95d56

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15144182

Change-Id: I142bc9be54ef7b5ae3e582b56f0a1bac14a688e7