The $hasLangauges and $hasVariants checks were used in couple places,
which lead to the same code used in many places.
Following the DRY rule, let's implement a Service that can do that
check, and use that service everywhere in code.
Bug: T224735
Change-Id: I46d58758356e870c408a74b2c087a42d6ad0ddea
Piotr Miazga