Merge "Add transient notification views of group children to the child...

Merge "Add transient notification views of group children to the child container, not directly to the row." into udc-dev am: b519cb5f am: b2a77c06

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21538354



Change-Id: I8b440079c8658e69b5dc3a8fa0f71ecc259c62f4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>