Use splitindex for google-api-grpc javadoc.

[kolea2]

No description provided.

[kolea2]

@chingor13 PTAL

[codecov]

Codecov Report

Merging #4952 into master will decrease coverage by 0.33%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #4952 +/- ##
============================================
- Coverage 50.36% 50.02% -0.34% 
Complexity 23666 23666 ============================================
Files 2233 2233 Lines 225860 225808 -52 Branches 24956 24190 -766 ============================================
- Hits 113744 112966 -778 + Misses 103519 103508 -11 - Partials 8597 9334 +737

Impacted Files	Coverage Δ	Complexity Δ
...va/com/google/cloud/compute/v1/InstanceClient.java	48.95% <0%> (-6.46%)	139% <0%> (ø)
...ava/com/google/cloud/compute/v1/ProjectClient.java	51.14% <0%> (-5.94%)	55% <0%> (ø)
...ava/com/google/cloud/compute/v1/NetworkClient.java	49.63% <0%> (-5.84%)	35% <0%> (ø)
...ava/com/google/cloud/compute/v1/LicenseClient.java	50.41% <0%> (-5.79%)	31% <0%> (ø)
.../com/google/cloud/compute/v1/RegionDiskClient.java	48.92% <0%> (-5.76%)	35% <0%> (ø)
...va/com/google/cloud/compute/v1/SnapshotClient.java	50% <0%> (-5.74%)	31% <0%> (ø)
.../java/com/google/cloud/compute/v1/ImageClient.java	49.04% <0%> (-5.74%)	43% <0%> (ø)
.../google/cloud/compute/v1/TargetSslProxyClient.java	48.57% <0%> (-5.72%)	35% <0%> (ø)
.../google/cloud/compute/v1/SecurityPolicyClient.java	48.1% <0%> (-5.7%)	39% <0%> (ø)
...d/compute/v1/RegionInstanceGroupManagerClient.java	48.81% <0%> (-5.69%)	51% <0%> (ø)
... and 140 more

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[chingor13]

Should we do it for google-cloud-clients as well?