Merge "Hooks for interracting with stage split components using legacy...

Merge "Hooks for interracting with stage split components using legacy recentsanimation" into sc-v2-dev am: 33edb79a am: 4f208d01

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15193834

Change-Id: I1e65a1617dd681fa7f3c2cf70d2677023ad638a8