Add fields needed for WHIP to SFU support (#1183)

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Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

Author: biglittlebigben

.changeset/sixty-numbers-lick.md

@@ -0,0 +1,5 @@
+---
+"@livekit/protocol": patch
+---
+
+Add fields needed for WHIP to SFU support

protobufs/rpc/ingress.proto

@@ -77,10 +77,13 @@ message ICERestartWHIPResourceRequest {
   string user_fragment = 3;
   string password = 4;
   repeated string candidates = 5;
+  string raw_trickle_ice_sdpfrag = 6;
+  string if_match = 7;
 }
 
 message ICERestartWHIPResourceResponse {
   string trickle_ice_sdpfrag = 1;
+  string etag = 2;
 }
 
 message StartIngressRequest {