Merge "Allow implicit conversions for NN errors -- hal" am: 68e98f40dc am: d236dbf3b3 am: 36c599d513

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1859936

Change-Id: I1776230fdb7fd06a77e1b7dc0e30b29dfd363cc4