[SDL 0289] Support for Set Language Separately

Proposal: [Support for Set Language Separately](https://github.com/smartdevicelink/sdl_evolution/blob/master/proposals/0289-set-language-separately.md)

> This proposal provides support for updating to two separate languages.

Review: https://github.com/smartdevicelink/sdl_evolution/issues/963