My personal views on this topic is, Google is Afraid of Microsoft, reasons are:
1. Microsoft's first moto is the security of customers using their services, and all of us know how secured google services are.
2. If they would give their services on Microsoft platforms then no one will ever choose android unless and until customizations are more important than security for users, this will indirectly effect the android user base of Google.
I don't think so that corporates have dropped BB and switched to android, I've seen that corporates now a days give windows phone to their employees or and iPhone, rarely I see corporates using Android as their primary phone for their job.
Even when I bought the windows phone I felt that is little complicated because of absence of google services but now I am comfortable and now I don't even use Google search on PC.the only google service I use is YouTube and there are good third party apps for that and I like it. So I personally don't think that google services are that important.