Correctly set the process exit code am: 0d3f1a4386

Original change: https://android-review.googlesource.com/c/platform/tools/acloud/+/2972211

Change-Id: I03f5c12716e3e0ae4e63289cbb7a9691465e20d4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>