Solutions for Android 65k method limit?

In my project, I'm currently running into the "Too many method references" error. The limit is 65k when trying to build for Android APK. This is because we're using a lot of extensions, expecially Google Play Services, which apparently takes up around 20k methods by itself.

Android native compiling mentions the use of the multi-dex option when building the APK, but I'm not sure how to enable that for ADT or Flash Builder. Anyone have any idea how to get past this limit?