Add specific error codes to enable better error handling am: be0a349a6d am: 69152be17b

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2857466

Change-Id: I889f986e9c8e7cb9ad63f469533c94b8e5aae93c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>