patchbayUnknownLifecycleState function
The reader paired with an overridden isAppResumed.
A consumer that decides "resumed" for itself has, by construction, made the
binding's own state a different question. Reporting the binding anyway would
let a rejection say resumed while explaining that the App is not resumed;
unknown is the honest answer until that consumer supplies a reader too.
Implementation
AppLifecycleState? patchbayUnknownLifecycleState() => null;