Linkpreview will try to fetch a text extract using the api and, if this
doesn't fail, show the extract as a drawer with a button "Continue to
article". If the query fails, it will redirect the user to the article
directly.
Bug: T113243
Depends-On: I6d8c5b80e70c3d8d1a92a70cc91e1b90d598cb0f
Change-Id: Idbaae9fe2decd89b73e623a25fbd39464c316fb2
