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: f67d81a4

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



Change-Id: I3f2e3ef70cbc8c59a05b6593aa02c6c3fecc56a9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>