FeatureManager::registerRequirement established the interface for a
requirement: its name and whether it's met.
However, the Feature Manager also needs to handle scenarios where a
requirement needs additional context before it can be considered met.
That context may not be available when the application is booting, e.g.
checking if the user is logged in; or the logic is complicated enough
that it should be under test.
Changes:
- Add the Requirement interface and update FeatureManager to work with
implementations of it
- Maintain B/C by constructing an instance of a the SimpleRequirement
DTO
Bug: T244481
Change-Id: Id95d9e5d7125492968d0e15515224aadbc3075f8
