[automerger skipped] Add HIDL lifetime and protecting callback info to NN...

[automerger skipped] Add HIDL lifetime and protecting callback info to NN README am: aad934ba am: c9b2587d am: d761a36c -s ours

am skip reason: Change-Id Id381895535d708b627f4746687b4d12e16560639 with SHA-1 7a655bb3 is in history

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1534939

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ia2854b257061ce0af201cb122706686b28772e08