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

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

Change-Id: I27f0b79b124de27454a156dd0ad0937ea853d3f3