feat(HelpButton): Mobile support.

react/features/base/util/openURLInBrowser.native.js

@@ -0,0 +1,17 @@
+// @flow
+
+import { Linking } from 'react-native';
+
+import logger from './logger';
+
+/**
+ * Opens URL in the browser.
+ *
+ * @param {string} url - The URL to be opened.
+ * @returns {void}
+ */
+export function openURLInBrowser(url: string) {
+    Linking.openURL(url).catch(error => {
+        logger.error(`An error occurred while trying to open ${url}`, error);
+    });
+}