config: Include vendor/crowdin overlays

Include translations for languages not available in AOSP.

This used to be split to each repository but it required forking AOSP
repositories just to add translations. Including them via overlay
avoids forking and makes the translations more portable, they can even
be used on pure AOSP builds.

Make them built in to avoid RRO issues.

Change-Id: Icc4c7b3a583c3d8a139a4a9a856dfca57952e131