Polyfill Element.innerHTML

Lib-jitsi-meet uses jQuery's .append method to manipulate Jingle. The
method in question invokes the getter and setter of Element.innerHTML.
Unfortunately, xmldom which we use in React Native to polyfill DOM does
not polyfill Element.innerHTML. So polyfill it ourselves.

react/features/base/lib-jitsi-meet/native/polyfills-browser.js

@@ -143,11 +143,49 @@ function _visitNode(node, callback) {
         const elementPrototype
             = Object.getPrototypeOf(document.documentElement);
 
-        if (elementPrototype
-                && typeof elementPrototype.querySelector === 'undefined') {
-            elementPrototype.querySelector = function(selectors) {
-                return _querySelector(this, selectors);
-            };
+        if (elementPrototype) {
+            if (typeof elementPrototype.querySelector === 'undefined') {
+                elementPrototype.querySelector = function(selectors) {
+                    return _querySelector(this, selectors);
+                };
+            }
+
+            // Element.innerHTML
+            //
+            // Required by:
+            // - jQuery's .append method
+            if (!elementPrototype.hasOwnProperty('innerHTML')) {
+                Object.defineProperty(elementPrototype, 'innerHTML', {
+                    get() {
+                        return this.childNodes.toString();
+                    },
+
+                    set(innerHTML) {
+                        // MDN says: removes all of element's children, parses
+                        // the content string and assigns the resulting nodes as
+                        // children of the element.
+
+                        // Remove all of element's children.
+                        this.textContent = '';
+
+                        // Parse the content string.
+                        const d
+                            = new DOMParser().parseFromString(
+                                    `<div>${innerHTML}</div>`,
+                                    'text/xml');
+
+                        // Assign the resulting nodes as children of the
+                        // element.
+                        const documentElement = d.documentElement;
+                        let child;
+
+                        // eslint-disable-next-line no-cond-assign
+                        while (child = documentElement.firstChild) {
+                            this.appendChild(child);
+                        }
+                    }
+                });
+            }
         }
 
         // FIXME There is a weird infinite loop related to console.log and