token-server: Add protos for new API for generating service account tokens.

tokenserver/appengine/impl/services/admin/adminsrv/service.go

 // Copyright 2016 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 // Package adminsrv implements Admin API.
 //
 // Code defined here is either invoked by an administrator or by the service
 // itself (via cron jobs or task queues).
 package adminsrv
 
 import (
         "github.com/luci/luci-go/appengine/gaeauth/server/gaesigner"
 
         "github.com/luci/luci-go/tokenserver/appengine/impl/certconfig"
         "github.com/luci/luci-go/tokenserver/appengine/impl/delegation"
         "github.com/luci/luci-go/tokenserver/appengine/impl/machinetoken"
+        "github.com/luci/luci-go/tokenserver/appengine/impl/serviceaccounts"
 
         "github.com/luci/luci-go/tokenserver/api/admin/v1"
 )
 
 // serverImpl implements admin.AdminServer RPC interface.
 type serverImpl struct {
         certconfig.ImportCAConfigsRPC
         delegation.ImportDelegationConfigsRPC
+        serviceaccounts.ImportServiceAccountsConfigsRPC
         machinetoken.InspectMachineTokenRPC
         delegation.InspectDelegationTokenRPC
+        serviceaccounts.InspectOAuthTokenGrantRPC
 }
 
 // NewServer returns prod AdminServer implementation.
 //
 // It assumes authorization has happened already.
 func NewServer() admin.AdminServer {
         signer := gaesigner.Signer{}
         return &serverImpl{
                 InspectMachineTokenRPC: machinetoken.InspectMachineTokenRPC{
                         Signer: signer,
                 },
                 InspectDelegationTokenRPC: delegation.InspectDelegationTokenRPC{
                         Signer: signer,
                 },
         }
 }