Support "--launch-args" to add args in launch_cvd command. am: 877df86aab am: 18fe910765 am: 6b3d94d1c8 am: 9657133900

Original change: https://android-review.googlesource.com/c/platform/tools/acloud/+/1676252

Change-Id: If017f273367b8597919b3b070fd4bf0404274d87