Upgrade bazlets to latest stable-2.16 to build with 2.16.19 API
Upgrade bazlets to latest stable-2.16 to build with 2.16.19 API

Change-Id: Iea2d2c09590a90622798dcd0b330254b49e0b4f5

GerritCodeReview/plugins_quota,GerritCodeReview/plugins_quota,GerritCodeReview/plugins_quota