Merge "Have PopContainerWithArrow require BaseDraggingActivity." into sc-v2-dev am: e3b26d0102 am: f5b5785a35

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15984295

Change-Id: I7b251e9f122e1638ca516aaef58daf5068fcdee4