Merge "Allow implicit conversions for NN errors -- hal" am: 68e98f40dc am: d236dbf3b3 am: 36c599d513 am: 0e0dc63cff

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

Change-Id: I1eb53c2749850f8442ef6aba8089294590068c51