Merge "Use same calculation for portrait as fake landscape for layout of split...

Merge "Use same calculation for portrait as fake landscape for layout of split thumbnails" into udc-dev am: 5873535e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/23214517



Change-Id: I7d24345d9fb7dfcd046ddb662a3e90bba9c19199
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>