I have been using Intellij IDEA w/git integration for Android dev for sometime. I have recently upgraded to Android Studio (v0.1.1) and now one of my favorite shortcuts Ctrl
I know I am late to the party, but this solved my problem.
Please note, that Android Studio also has its own Ignored Files list. If you can commit files with other git clients or using git in terminal, this could be the problem. In Android Studio go to File > Settings > Version Control > Ignored Files and remove files/folders from the list. Now you should be able to add files to git.