Mark display parameter to be nullable am: d2969842 am: a21577e5 am: 92870f6e am: d4831b16

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/18670795



Change-Id: I1b9b442a82051dd509e0983bfba9add7af875312
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>