Merge branch 'stable-3.1' * stable-3.1: Upgrade bazlets to latest stable-3.1 to build with 3.1.8 API Upgrade bazlets to latest stable-3.0 to build with 3.0.12 API Upgrade bazlets to latest stable-2.16 to build with 2.16.22 API Change-Id: I0d6d8032b58b2861992a7d99119ba828ff1839b0