Dependencies

• Bumped perfmark to 0.19.0
• Bumped error_prone_annotations to 2.3.3

Bug Fixes

• alts: fixed wrong ComputeEngineChannelBuilder class signature (#6381)

New Features

• grpclb: Add dns NameResolver to io.grpc.grpclb that has SRV record lookup enabled by default (#6298). This allows using grpclb without the -Dio.grpc.internal.DnsNameResolverProvider.enable_grpclb=true system property. Note that grpclb is still experimental and deprecated. In particular, we plan to change grpclb policy selection which together with this change provides a path forward for grpclb to function without custom support in grpc-core; see gRFC A26