Merge "Do not apply letterbox when entering PiP" into udc-dev am: cceba8e2...

Merge "Do not apply letterbox when entering PiP" into udc-dev am: cceba8e2 am: f382b873 am: 324c572d am: 81837a7c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23628060



Change-Id: I64fd1a64d74f02e78d0fa2f9862682c5e384d60a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>