AndroidX (formerly known as Android Support) libraries have moved

frameworks/support is no longer part of the platform checkout. Android platform now uses prebuilts of AndroidX for everything. AndroidX is being developed as an unbundled project.

Next steps

• For source-code for your IDE, please use *-sources.jars in prebuilts/sdk/current/androidx
• To contribute, check out AOSP AndroidX repository (guide here).
  • repo init -u https://android.googlesource.com/platform/manifest -b androidx-master-dev
• For secret platform work, you can use internal ub-supportlib-master repo.
  • repo init -u persistent-https://googleplex-android.git.corp.google.com/platform/manifest -b ub-supportlib-master