Merge "Show secondary home handle in immersive apps" into rvc-dev am:...

Merge "Show secondary home handle in immersive apps" into rvc-dev am: babd08b5 am: 9551b9ad am: d44e5c43 am: 61ba1f1b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11932144

Change-Id: Iadb999f62394cfae901cd21e3b9dbe1bc912b670