Fix help message when no args entered; alias fixes am: bd56297c4f am: 654424851c

Original change: https://android-review.googlesource.com/c/platform/tools/asuite/+/3313440

Change-Id: I742f23f327b93dc05b325b62d565160dfef3895a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>