Seems like a stretch for Google to listen to talk and to update their search suggestions based on it. More than likely other people have searched for the same thing.
If someone is paranoid about the danmed thing “listening” then he should rip it out and throw it away!
If it has a microphone then they are.
I just tried it. I typed mount into google search. Did NOT get mountain lion. Top three were:
-Mountain men
-Mountain Brook, Ala
-Mountain dew