Rename parser arguments to fit command line convention am: 904aac2b3e am: d56b397cf3 am: 2d773c3259 am: 9aacc7b81d

Original change: https://android-review.googlesource.com/c/platform/tools/external_updater/+/2548554

Change-Id: I8b70af5c2a60e10fe32023e4f6153ee5823a706a
Signed-off-by: Automerger Merge Worker <[email protected]>