I meet this problem, changing the build tool/ sdk version didn't work, clearly write compile version didn't work, off line build didn't work.
Finally I just change wearable version, and this problem gone.
provided 'com.google.android.wearable:wearable:2.0.4'
compile 'com.google.android.support:wearable:2.0.4'
to
provided 'com.google.android.wearable:wearable:2.0.2'
compile 'com.google.android.support:wearable:2.0.2'
By the way, I used offline building now because it is really fast when I check this issue.