Group calling: tell RingRTC about our rendered resolutions for perf

ts/util/ringrtc/nonRenderedRemoteParticipant.ts

@@ -0,0 +1,12 @@
+// Copyright 2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { GroupCallVideoRequest } from '../../types/Calling';
+
+export const nonRenderedRemoteParticipant = ({
+  demuxId,
+}: Readonly<{ demuxId: number }>): GroupCallVideoRequest => ({
+  demuxId,
+  width: 0,
+  height: 0,
+});