Merge "Handle case where NN AIDL callback is null in IDevice::prepareModel*" am: 5d4f1b70c2

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2072333

Change-Id: I0cd6b97aa6b0e2a2591b59bb4c13ff3ca05632cc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>