The link to open when the app isn't installed. Specify this to do something other than install your app
from the Play Store when the app isn't installed, such as open the mobile web version of the content, or
display a promotional page for your app.
public var amv:int = -1
The versionCode of the minimum version of your app that can open the link. If the installed app is an
older version, the user is taken to the Play Store to upgrade the app.
public var apn:String
The package name of the Android app to use to open the link. The app must be connected to your project
from the Overview page of the Firebase console. Required for the Dynamic Link to open an Android app.