Merge "Allow entering PiP when pressing home while in car mode." into udc-dev am: d2c2751b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23093656



Change-Id: Id18874d0b5fd1e28e13d0335a1ef36046d9bd36c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>