Merge "Fix divider bar won't fade-in as the other splitting tasks" into tm-dev am: 59939e9e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17935107



Change-Id: I523efffd571c815efe94836f3560d3b1c60788b7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>