tensorflow: Duplicated Java outer classname

Describe the current behavior Option values of java_outer_classname in tensorflow/compiler/tf2xla/host_compute_metadata.proto and tensorflow/compiler/tf2xla/tf2xla.proto are the same, result in protoc failure for Java:

> protoc: stdout: . stderr: tensorflow/compiler/xla/rpc/xla_service.proto: warning: Import tensorflow/compiler/xla/xla_data.proto but not used.
  tensorflow/core/protobuf/replay_log.proto: warning: Import tensorflow/core/framework/graph.proto but not used.
  tensorflow/core/protobuf/replay_log.proto: warning: Import tensorflow/core/protobuf/cluster.proto but not used.
  org/tensorflow/tf2xla/Tf2XlaProtos.java: Tried to write the same file twice.

Describe the expected behavior protoc succeeds without error. java_outer_classname in tensorflow/compiler/tf2xla/host_compute_metadata.proto may be renamed to HostComputeMetadataProtos

Code to reproduce the issue

Just protoc

Other info / logs