Regenerate ocagent proto files

[mayurkale22]

Fixes #455

[codecov-io]

Codecov Report

Merging #456 into master will increase coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #456      +/-   ##
==========================================
+ Coverage   94.89%   94.95%   +0.06%     
==========================================
  Files         148      148              
  Lines        9850     9912      +62     
  Branches      701      700       -1     
==========================================
+ Hits         9347     9412      +65     
+ Misses        503      500       -3

Impacted Files	Coverage Δ
src/http-stats.ts	100% <0%> (ø)	⬆️
src/binary-format.ts	100% <0%> (ø)	⬆️
src/grpc-stats/server-stats.ts	100% <0%> (ø)	⬆️
src/grpc-stats/client-stats.ts	100% <0%> (ø)	⬆️
src/grpc-stats/common-distributions.ts	100% <0%> (ø)	⬆️
src/grpc-stats/stats-common.ts	100% <0%> (ø)	⬆️
src/stackdriver-monitoring.ts	83.33% <0%> (+3.12%)	⬆️
src/common-utils.ts	95.83% <0%> (+20.83%)	⬆️

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