Merge branch 'stable-3.0' into stable-3.1 * stable-3.0: 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: I901586a53d0e22bba4235d401edb1e04e4701c08