first implementation of PTT; Adjusting Opus parameter for shorter pTime, lower bandwidth (mono) and Forward Error Correction

app/src/actions/meActions.js

@@ -74,3 +74,9 @@ export const setDisplayNameInProgress = (flag) =>
 		type    : 'SET_DISPLAY_NAME_IN_PROGRESS',
 		payload : { flag }
 	});
+
+	export const setIsSpeaking = (flag) =>
+	({
+		type    : 'SET_IS_SPEAKING',
+		payload : { flag }
+	});