Android Studio / Git / VCS Shelve

You can find your shelf in the Changes window, which you can find under View -> Tool Windows -> Changes (or press ⌘9 on Mac, maybe Ctrl9 on Windows?)

Right clicking on your change gets you options for it, more info can be found at IntelliJ's doc site (since Android Studio is IntelliJ with some more Android stuff): http://www.jetbrains.com/idea/webhelp/intellij-idea-tool-windows.html