Merge "Add system feature for car splitscreen multitasking" into udc-dev am:...

Merge "Add system feature for car splitscreen multitasking" into udc-dev am: b0e65046 am: 10b626b2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23335092



Change-Id: I585108ff419a8423d12f5e0151b1022d3c695e26
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>