Merge branch 'stable-3.1' * stable-3.1: Fix bazlets using latest stable-3.1 to build with 3.1.5 API Upgrade bazlets to latest stable-3.1 to build with 3.1.5 API Upgrade bazlets to latest stable-3.0 to build with 3.0.9 API Upgrade bazlets to latest stable-2.16 to build with 2.16.19 API Change-Id: I2dd7f6b101915590ef08c71f698eacafcbbf90e1