Merge "Fix divider bar not shown when entering split with rotation transition" into tm-dev am: 01eda663 am: 1ab1d7b8 am: 5f67ca31

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18247768



Change-Id: I39f2779b4aeff08619b49b248504c27fac6ef9c4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>