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

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

Change-Id: Ida156868c781a259d51bfe7b3aac8396e5ca83f4