Merge "Handle case where NN AIDL callback is null in IDevice::prepareModel*" into tm-dev am: 9265715fc7

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/18102697

Change-Id: I9653914adc3d2511115a8e766f679b51e98c1c46
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>