feat(v1): add v1 client

[chingor13]

No description provided.

[codecov]

Codecov Report

Merging #190 into master will increase coverage by 0.25%.
The diff coverage is 75.61%.

@@             Coverage Diff              @@
##             master     #190      +/-   ##
============================================
+ Coverage     75.10%   75.36%   +0.25%     
- Complexity      274      548     +274     
============================================
  Files            24       48      +24     
  Lines          2470     4992    +2522     
  Branches         22       44      +22     
============================================
+ Hits           1855     3762    +1907     
- Misses          587     1174     +587     
- Partials         28       56      +28     

Impacted Files	Coverage Δ	Complexity Δ
...ming/v1/stub/GameServerDeploymentsServiceStub.java	6.25% <6.25%> (ø)	1.00 <1.00> (?)
.../gaming/v1/stub/GameServerClustersServiceStub.java	7.14% <7.14%> (ø)	1.00 <1.00> (?)
...google/cloud/gaming/v1/stub/RealmsServiceStub.java	8.33% <8.33%> (ø)	1.00 <1.00> (?)
...aming/v1/GameServerDeploymentsServiceSettings.java	10.60% <10.60%> (ø)	2.00 <2.00> (?)
...d/gaming/v1/stub/GameServerConfigsServiceStub.java	11.11% <11.11%> (ø)	1.00 <1.00> (?)
...d/gaming/v1/GameServerClustersServiceSettings.java	11.66% <11.66%> (ø)	2.00 <2.00> (?)
.../google/cloud/gaming/v1/RealmsServiceSettings.java	15.55% <15.55%> (ø)	2.00 <2.00> (?)
...ud/gaming/v1/GameServerConfigsServiceSettings.java	15.90% <15.90%> (ø)	2.00 <2.00> (?)
.../GrpcGameServerClustersServiceCallableFactory.java	50.00% <50.00%> (ø)	4.00 <4.00> (?)
...b/GrpcGameServerConfigsServiceCallableFactory.java	50.00% <50.00%> (ø)	4.00 <4.00> (?)
... and 38 more

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