SI-7232 Fix Java import vs defn. binding precendence

Java Spec:
> A single-type-import declaration d in a compilation unit c
> of package p that imports a type named n shadows, throughout
> c, the declarations of:
>   - any top level type named n declared in another compilation
>     unit of p
>   - any type named n imported by a type-import-on-demand
>     declaration in c
>   - any type named n imported by a static-import-on-demand
>     declaration in c

Scala Spec:
> Bindings of different kinds have a precedence deﬁned on them:
>   1. Deﬁnitions and declarations that are local, inherited, or made
>      available by a package clause in the same compilation unit where
>      the deﬁnition occurs have highest precedence.
>   2. Explicit imports have next highest precedence.

Review by @vigdorchik