Show local speaking indicator for group calls

ts/types/Calling.ts

@@ -1,4 +1,4 @@
-// Copyright 2020-2021 Signal Messenger, LLC
+// Copyright 2020-2022 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
 import type { AudioDevice } from 'ringrtc';
@@ -28,6 +28,7 @@ type ActiveCallBaseType = {
   conversation: ConversationType;
   hasLocalAudio: boolean;
   hasLocalVideo: boolean;
+  amISpeaking: boolean;
   isInSpeakerView: boolean;
   isSharingScreen?: boolean;
   joinedAt?: number;