Merge "Add DisplayController in PreviewContext's allowed objects" into tm-dev am: c1ea2da7f3 am: a76a2931da am: 459dc71f06 am: df2af215dc

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/18198386

Change-Id: I528903ded953bebcec94cda8e11f7f3704ed94bb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>