Merge "Letterbox resizable fixed orientation activities in multi-window." into...

Merge "Letterbox resizable fixed orientation activities in multi-window." into tm-dev am: 8d7c5727 am: f46cd5ec

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18185147



Change-Id: Id313a9b09468d7f5f3ba01a6ab5c1dc3c8f65255
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>