Merge "Merge "Do not letterbox the activity in PiP mode" into udc-dev am:...

Merge "Merge "Do not letterbox the activity in PiP mode" into udc-dev am: 41667fa9 am: 3b341fdb am: d7fb275b" into udc-qpr-dev-plus-aosp am: 7c780354

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23503609



Change-Id: I60660a6ca7a0ff83dce3e7b545425664f506d802
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>