Merge "Allow users to dismiss notifications in popup view." into sc-qpr1-dev am: 2f9f6378be am: eed0520799 am: 44b3eed902

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

Change-Id: Ic6b61a559c0fd0f92cdc8f73867ea2bbdc3d830c