[automerger skipped] Letterbox apps in multi-window if resizeable only due to...

[automerger skipped] Letterbox apps in multi-window if resizeable only due to supportsPictureInPicture. am: 417fd4d1 -s ours am: d5270cf8 -s ours am: 5ee0dd7e -s ours am: 036e45e8 -s ours am: 572a4c51 -s ours am: a925544e -s ours

am skip reason: Merged-In I664742b033ad49a77ae21b28c7ade4011d123c74 with SHA-1 5e7baf63 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17061634

Change-Id: Icff05e641515cc0e103ba85f6eb1d76fd603ecd7