Merge branch 'stable-3.0' into stable-3.1

* stable-3.0:
  Upgrade bazlets to latest stable-2.16 to build with 2.16.17 API
  Upgrade bazlets to latest stable-3.0 to build with 3.0.8 API
  Upgrade bazlets to latest stable-3.0
  Upgrade bazlets to latest stable-2.16

Change-Id: I5c7f70edcdb644bcf444f71f9f03bd8ebb0f64ed