Prevent app re-adding itself to "open on login" list

Its kind of annoying but you can try locking the plist that controls login items.

1. Navigate to `~/Library/Preferences/loginwindow.plist
2. Select the file and press Command + I
3. Check "Locked"

Note: This will prevent all applications (and you) from adding or removing login items, so remove the application from login items and then lock the file.

Sometimes, upon installation, applications add files to the root level Library folder's /Library/LaunchAgents, /Library/LaunchDaemons or /Library/StartupItems subfolders that can result in the behavior you're observing. You will need Admin access in order to remove any files related to the "Android File Transfer" app that may be located in these folders.