No, Google is not making the Android SDK proprietary. What's the fuss about?
Summary: The Free Software Foundation Europe is claiming that recent changes to the Google's Android Software Development Kit licensing terms has made the SDK into proprietary software. But if you look closely, that doesn't appear to be the case.
Google attempts to stymie Android fragmentation by locking down the Android SDK
Shocker: Android SDK binaries still proprietary
Android SDK Not Open, Not Free, Now Proprietary