Merge "Polish home-key from split to pip transition" into udc-dev am: c7a500cc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23833763



Change-Id: I5d1d0b58b6e82698b61b16a795546e6345887ecb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>