Merge "Allow mixed handler to handle transitions that might enter PIP" into udc-qpr-dev am: fd74093460 am: 6da008d5eb

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/25039491

Change-Id: I9cac3a693894f67e694ceca68902ecc7157a614e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>