deps: update dependency io.grpc:grpc-protobuf to v1.50.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.grpc:grpc-protobuf	1.49.2 -> 1.50.0

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Release Notes

grpc/grpc-java

v1.50.0

New Features

• okhttp: Added connection management features to okhttp server, including maxConnectionIdle(), permitKeepAliveTime(), and permitKeepAliveWithoutCalls() (#​9494, #​9544)
• binder: Add SecurityPolicies for checking device owner/profile owner (#​9428)

API Changes

• api: Add LoadBalancer.acceptResolvedAddresses() (#​9498). The method is like handleResolvedAddresses() but returns a boolean of whether the addresses and configuration were accepted. Not accepting the update triggers the NameResolver to retry after a delay. We are not yet encouraging migration to this method, as there is still a second future API change
• core: add CallOptions to CallCredentials.RequestInfo (#​9538)

Bug Fixes

• auth: Fix AppEngine failing while retrieving access token when instantiating a blocking stub using AppEngineCredentials (#​9504)
• core: Ensure that context cancellationCause is set (#​9501)
• core: Update outlier detection max ejection logic to allow exceeding the limit by one, to match Envoy. (#​9489, #​9492)
• core: outlier detection to honor min host request volume (#​9490)
• okhttp: Add timeout for HTTP CONNECT proxy handshake (#​9586)
• xds: ringhash policy in TRANSIENT_FAILURE should not attempt connecting when already in connecting (#​9535). With workloads where most requests have the same hash, ring hash should behave more like pick-first of slowly trying backends

Dependencies

• netty: upgrade netty from 4.1.77.Final to 4.1.79.Final and tcnative from 2.0.53 to 2.0.54 (#​9451)

Acknowledgements

@​cpovirk
@​prateek-0
@​sai-sunder-s

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