fix(ConnectionQuality): Do not show red/yellow GSM bars on join.

When the user first unmutes their video, the connection quality is shown as poor until the local stats are available.
Calculate the connection quality only after the stats are available, i.e., assume 100% until pcStatsInterval has elapsed.

modules/connectivity/ConnectionQuality.js

@@ -71,13 +71,6 @@ let startBitrate = 800;
  * @param videoQualitySettings {Object} the bitrate and codec settings for the local video source.
  */
 function getTarget(simulcast, resolution, millisSinceStart, videoQualitySettings) {
-    // Completely ignore the bitrate in the first 5 seconds, as the first
-    // event seems to fire very early and the value is suspicious and causes
-    // false positives.
-    if (millisSinceStart < 15000) {
-        return 1;
-    }
-
     let target = 0;
     let height = Math.min(resolution.height, resolution.width);
 
@@ -163,6 +156,11 @@ export default class ConnectionQuality {
          */
         this._lastConnectionQualityUpdate = -1;
 
+        /**
+         * Conference options.
+         */
+        this._options = options;
+
         /**
          * Maps a participant ID to an object holding connection quality
          * statistics received from this participant.
@@ -182,8 +180,8 @@ export default class ConnectionQuality {
         this._timeVideoUnmuted = -1;
 
         // We assume a global startBitrate value for the sake of simplicity.
-        if (options.config.startBitrate && options.config.startBitrate > 0) {
-            startBitrate = options.config.startBitrate;
+        if (this._options.config?.startBitrate > 0) {
+            startBitrate = this._options.config.startBitrate;
         }
 
         // TODO: consider ignoring these events and letting the user of
@@ -354,12 +352,17 @@ export default class ConnectionQuality {
                 // Time since sending of video was enabled.
                 const millisSinceStart = window.performance.now()
                     - Math.max(this._timeVideoUnmuted, this._timeIceConnected);
+                const statsInterval = this._options.config?.pcStatsInterval ?? 10000;
 
                 // Expected sending bitrate in perfect conditions.
                 let target = getTarget(isSimulcastOn, resolution, millisSinceStart, videoQualitySettings);
 
                 target = Math.min(target, MAX_TARGET_BITRATE);
-                quality = 100 * this._localStats.bitrate.upload / target;
+
+                // Calculate the quality only after the stats are available (after video was enabled).
+                if (millisSinceStart > statsInterval) {
+                    quality = 100 * this._localStats.bitrate.upload / target;
+                }
             }
 
             // Whatever the bitrate, drop early if there is significant loss