Google's market share of the cloud space is quite small especially compared to legacy players (microsoft IBM etc etc) and AWS (Amazon Web Services). Now having high profile client such as spotify using their cloud service is extremely powerful, especially if they're pushing the niche of being the best at data analytics.
Google home is a total snake move and a bad one at that. Long term they're not going to be able to make an apple music, they're too late in the game, they need to partner with someone relevant or acquiree someone if they want to use the android platform as an edge for their music service.