Merge "Allow users to dismiss notifications in popup view." into sc-qpr1-dev am: 2f9f6378be am: eed0520799

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15690344

Change-Id: I9da12885327677e30f505ef91a741238c4be7bda