Merge "Adds launcher-side support for the SmartSpace shared element transition." into sc-dev am: bdb4ed711c am: 07bf81d6b1 am: ef6f1f2446

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14471950

Change-Id: I4f7a38cc87c0720bee515407d5f4783d84a310ac