Does Android still support Quick Search Box integration? [duplicate]

Question

I read some information about Quick Search Box and downloaded the SearchableDictionary sample to understand how to make app content available in the global search. When I deploy the app to my phone (Android M) it does not show in the selection list in the 'Phone Search' settings.

1. [ANSWERED] Is QSB support officially dead? I read this post but the answer is old and this one suggests App Indexing replaces it.

2. How do the two compare?

Answer 1

After more searching I see that this post confirms that global search is no longer supported for phones/tablets but still exists for Android TV.