message: [tpu:profiler] Modify the fields in host-independent and host-dependent job info in tf_op_stats.proto.
diff: @@ -117,9 +117,9 @@ message HloExtraInfoMapResult {
  // Result proto for host-independent job information.
  message HostIndependentJobInfoResult {
  // The change-list number of this build.
  - optional string change_list = 1;
  + optional int64 change_list = 1;
  // The time of this build.
  - optional string build_time = 2;
  + optional int64 build_time = 2;
  // The target of this build.
  optional string build_target = 3;
  }
  @@ -131,7 +131,7 @@ message HostDependentJobInfoResult {
  // The command line used to run the job.
  optional string command_line = 2;
  // The start time of the job on this host.
  - optional string start_time = 3;
  + optional int64 start_time = 3;
  }
  // Result proto for RunEnvironment (the run environment of a profiling session).
  @@ -144,11 +144,10 @@ message RunEnvironmentResult {
  optional int32 tpu_core_count = 3;
  // The per-TPU-core batch size.
  optional int32 per_core_batch_size = 4;
  - reserved 5; // was job_info.
  // Host-independent job information.
  - optional HostIndependentJobInfoResult host_independent_job_info = 6;
  + optional HostIndependentJobInfoResult host_independent_job_info = 5;
  // Host-dependent job information.
  - repeated HostDependentJobInfoResult host_dependent_job_info = 7;
  + repeated HostDependentJobInfoResult host_dependent_job_info = 6;
  }
  // Result proto for TfStatsHelper.
  