Merge "Update notification popup UI." into sc-dev am: 1bfd350ead am: ce8f58c4e0 am: 36fa6d30d3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15017911

Change-Id: Id8ab7a2b0fd91ebc0bb50a6a546674382630ec3d