update_engine: update error log am: 8879b04ea3

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2991907

Change-Id: Id1bc4c13744b432c8f115c8bab6d4f6a633e4cca
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>