Merge "Add DisplayController in PreviewContext's allowed objects" into tm-dev am: c1ea2da7f3 am: 750624728b

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

Change-Id: I025b12ad67a1b1da4878019ea693c2452e24de55
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>