I had this problem recently on Eclipse (not sure if this is a problem in Android Studio, but try it if you haven't solved it yet). The only solution I found was to use the old version of the Google Play Services library in my Wear project.
The latest version of the library (today it is 7095000) does not work with an emulator that you can create using Eclipse. So I went back to the older version (version 6587000), and GoogleApiClient now connects just fine.
If you do not have an older version, check out this answer , which refers to several earlier versions. The last thing you can get is version 6171000 ( download link ). He is a little older than the one I have, but it should work.
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