Android Studio 3.0 Beta 4 is now available in the Canary, Dev and Beta channels.
Changes
  • New Android plugin DSL for manipulating dependency matching strategy. You now provide fallbacks for missing build types and flavors using matchingFallbacks (which replaces buildTypeMatching and productFlavorMatching). You also provide the default selection and fallbacks for missing dimensions using missingDimensionStrategy (which replaces flavorSelection). To learn more, read Resolve build errors related to dependency matching.

If you already have an Android Studio preview installed, you can get the update by clicking Help > Check for Update (or Android Studio > Check for Updates on Mac). Otherwise, you can it download here.