Bump Bazel version to 2.2.0
Bump Bazel version to 2.2.0

Change-Id: Ie48144ddaccab8029bbc733e036cc1aebdcd6800

GerritCodeReview/plugins_serviceuser,GerritCodeReview/plugins_serviceuser,GerritCodeReview/plugins_serviceuser,GerritCodeReview/plugins_serviceuser,GerritCodeReview/plugins_serviceuser