Add dynamic interface casting to NN utility code am: e5e67024c6 am: 7a9e26d3bd

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1580709

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Id5e68c67edbf0546c0f06376f8ca7594c3c72b05