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

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

Change-Id: I438d4193b9a4ef33613f37e7a4ae30d3f663e6bb