add(face-landmarks): flag for rtc stats (#11682)

* add(face-landmarks): flag for rtc stats

* fix: check is faceLandmarks is defined

config.js

@@ -788,6 +788,9 @@ var config = {
     //     // Enables displaying face expressions in speaker stats
     //     enableDisplayFaceExpressions: false,
 
+    //     // Enable rtc stats for face landmarks
+    //     enableRTCStats: false,
+
     //     // Minimum required face movement percentage threshold for sending new face centering coordinates data.
     //     faceCenteringThreshold: 10,
 

react/features/rtcstats/middleware.js

@@ -25,7 +25,7 @@ import logger from './logger';
 MiddlewareRegistry.register(store => next => action => {
     const state = store.getState();
     const config = state['features/base/config'];
-    const { analytics } = config;
+    const { analytics, faceLandmarks } = config;
 
     switch (action.type) {
     case LIB_WILL_INIT: {
@@ -151,7 +151,7 @@ MiddlewareRegistry.register(store => next => action => {
         break;
     }
     case ADD_FACE_EXPRESSION: {
-        if (canSendRtcstatsData(state)) {
+        if (canSendRtcstatsData(state) && faceLandmarks && faceLandmarks.enableRTCStats) {
             const { duration, faceExpression, timestamp } = action;
 
             RTCStats.sendFaceExpressionData({