Merge "Consolidate animation to show divider bar" into tm-dev am: 56043e3d...

Merge "Consolidate animation to show divider bar" into tm-dev am: 56043e3d am: 1d0a63f6 am: 0ffdd0f6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18157809



Change-Id: Ie998c05baab656e90e91d79be87d4d24f6302854
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>