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

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

Change-Id: I96fc5db99fe268a6e284bddf73f9a3e225c860b4
Signed-off-by: Automerger Merge Worker <[email protected]>