Merge "Handle case where NN AIDL callback is null in IDevice::prepareModel*" am: 5d4f1b70c2 am: 84ec222eb5 am: aa9f97a0e2 am: b67524d4af am: 3c1ea74aef am: d62a1497d5

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

Change-Id: Ie6c35b56140718bc54e96c6dff634d77372909d8
Ignore-AOSP-First: this is an automerge
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>