feat(screenshare): emit source type when starting screenshare (#3959)

* feat(screenshare): emit source type when starting screenshare

* squash: update doc

modules/API/API.js

@@ -556,12 +556,17 @@ class API {
      * has been turned on/off.
      *
      * @param {boolean} on - True if screen sharing is enabled.
+     * @param {Object} details - Additional information about the screen
+     * sharing.
+     * @param {string} details.sourceType - Type of device or window the screen
+     * share is capturing.
      * @returns {void}
      */
-    notifyScreenSharingStatusChanged(on: boolean) {
+    notifyScreenSharingStatusChanged(on: boolean, details: Object) {
         this._sendEvent({
             name: 'screen-sharing-status-changed',
-            on
+            on,
+            details
         });
     }