Android Studio 3.1 RC3 is now available in the Beta channel.
This update includes fixes for the following public issues:
- Issue#73800636: Main dex list not tracing all classes annotated with runtime annotations
- Issue#70909581: okhttp fails sporadically on android 4.x mediatek devices
- Issue#73122455: External CMake building broken by using Gradle plugin newer than 3.0.1
If you already have an Android Studio build on the Canary or Dev channel, you can get the update by clicking Help > Check for Update (or Android Studio > Check for Updates on Mac). Otherwise, you can download here.