Merge "Sandbox changes for use in UXR prototype." into sc-dev am: 6c9f4ef566 am: 2b8b312b5b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13829605

Change-Id: I6374fdc90af1689745ba8d554b7a01eb52c7784c