Merge "Default initializing error_code_ to 0." am: 0a1e14501f am: c177ab6403 am: 520a18c380 am: 50df60a66d

Original change: https://android-review.googlesource.com/c/platform/system/keymaster/+/1748914

Change-Id: I52602366e357c6ef07dc4ee8a8b105f933f10d4a