1989384 - Lift the Store definition to be an interface instead of a class

Status: NEW

(Firefox for Android :: General, enhancement)

Description

[Matt Tighe [:matt-tighe]]

We should convert the Store type to be an interface instead of a class. This will empower downstream benefits like:

1. Subtypes are more likely to be defined as type aliases instead of subclasses, avoiding footguns with custom constructors and construction side-effects like InitActions
2. Allowing us more freedom in changing the underlying Store implementation - potentially create side-by-side concrete types for experimentation with alternatives.

This may require updating some existing Stores to avoid the footguns mentioned above first.