[Spotify] Do not try to reimport album if it is permanently removed from Spotify

[arsaboo]

Problem

Spotify often removes content from its library. There are two types of content removal:

In the first type, only the tracks are removed, but the data is still available. See this for example. Here's how it appears:

In the second type, everything is removed. See this for example. Here's how it appears (notice there is no information available here):

(Re)Import is perfectly fine for the first type of content as the data is still available. However, (re)importing (with search-id) in case of the second type of removal removes all the metadata.

We should add a check to see if valid data is being returned from Spotify before applying the metadata.