Adding configuration protos

components/copresence/proto/rpcs.proto

 syntax = "proto2";
 package copresence;
 option optimize_for = LITE_RUNTIME;
 import "codes.proto";
+import "config_data.proto";
 import "enums.proto";
 import "data.proto";
 message RequestHeader {
   optional ClientVersion client_version = 4;
   optional ClientVersion framework_version = 5;
   optional int64 current_time_millis = 6;
   optional string registered_device_id = 7;
   repeated string experiment_override = 8;
   optional DeviceFingerprint device_fingerprint = 10;
   optional string configuration_etag = 11;
 }
 message ResponseHeader {
   optional DebugInfo debug_info = 2;
   optional Status status = 3;
+  optional Configuration configuration = 4;
 }
 message RegisterDeviceRequest {
   optional RequestHeader header = 1;
   optional PushServiceRegistration push_service = 5;
   optional DeviceIdentifiers device_identifiers = 6;
 }
 message RegisterDeviceResponse {
   optional ResponseHeader header = 1;
   optional string registered_device_id = 2;
 }
@@ skipping 28 matching lines @@
   repeated Directive directive = 4;
 }
 message ManageMessagesResponse {
   optional util.error.Code status = 1;
   repeated MessageResult published_message_result = 3;
 }
 message ManageSubscriptionsResponse {
   optional util.error.Code status = 1;
   repeated SubscriptionResult subscription_result = 3;
 }