requestDowngrade
Whether an upgrade to a lower version of a package than currently installed is requested.
Ackpine sets downgrade-request flag which is honored for debuggable installed apps or debuggable OS builds, but does not add the unrestricted downgrade permission flag used by root, shell, or system identities. The device owner must still be authorized by Android to perform the downgrade, so setting this option does not guarantee that a downgrade will succeed.
This is a delicate API. The outcome of using this flag depends on the app being installed, on a specific OS build, and on the permissions that the used device owner identity has.