feat: report analytics for the network connection

Will emit new 'network.info' action with the online/offline status and
extra details for native like the network type and
'isConnectionExpensive' flag.

react/features/base/net-info/NetworkInfoService.web.js

@@ -0,0 +1,58 @@
+import EventEmitter from 'events';
+
+import { ONLINE_STATE_CHANGED_EVENT } from './events';
+
+/**
+ * The network info service implementation for web (Chrome, Firefox and Safari).
+ */
+export default class NetworkInfoService extends EventEmitter {
+
+    /**
+     * Creates new instance...
+     */
+    constructor() {
+        super();
+        this._onlineStateListener = this._handleOnlineStatusChange.bind(this, /* online */ true);
+        this._offlineStateListener = this._handleOnlineStatusChange.bind(this, /* offline */ false);
+    }
+
+    /**
+     * Callback function to track the online state.
+     *
+     * @param {boolean} isOnline - Is the browser online or not.
+     * @private
+     * @returns {void}
+     */
+    _handleOnlineStatusChange(isOnline) {
+        this.emit(ONLINE_STATE_CHANGED_EVENT, { isOnline });
+    }
+
+    /**
+     * Checks for support.
+     *
+     * @returns {boolean}
+     */
+    static isSupported() {
+        return window.addEventListener && typeof navigator.onLine !== 'undefined';
+    }
+
+    /**
+     * Starts the service.
+     *
+     * @returns {void}
+     */
+    start() {
+        window.addEventListener('online', this._onlineStateListener);
+        window.addEventListener('offline', this._offlineStateListener);
+    }
+
+    /**
+     * Stops the service.
+     *
+     * @returns {void}
+     */
+    stop() {
+        window.removeEventListener('online', this._onlineStateListener);
+        window.removeEventListener('offline', this._offlineStateListener);
+    }
+}