Use KmErrorOr<T> for key blob auth encryption am: 644cd4d692 am: 128cfe8fa5 am: 4b29aef1be am: 90d81b3cfa

Original change: https://android-review.googlesource.com/c/platform/system/keymaster/+/1784328

Change-Id: I2343bf46b97862ae33d5a8e3fafa1d09bac88a62