[RN] Fix calendar alerts when case sensitive URLs are used

react/features/base/connection/functions.js

     return url;
 }
 
+/**
+ * Gets a URL string without hash and query/search params from a specific
+ * {@code URL}.
+ *
+ * @param {URL} url - The {@code URL} which may have hash and query/search
+ * params.
+ * @returns {string}
+ */
+export function getURLWithoutParamsNormalized(url: URL): string {
+    const urlWithoutParams = getURLWithoutParams(url).href;
+
+    if (urlWithoutParams) {
+        return urlWithoutParams.toLowerCase();
+    }
+
+    return '';
+}
+
 /**
  * Converts a specific id to jid if it's not jid yet.
  *

react/features/calendar-sync/components/ConferenceNotification.native.js

 import { connect } from 'react-redux';
 
 import { appNavigate } from '../../app';
-import { getURLWithoutParams } from '../../base/connection';
+import { getURLWithoutParamsNormalized } from '../../base/connection';
 import { getLocalizedDateFormatter, translate } from '../../base/i18n';
 import { Icon } from '../../base/font-icons';
 import { ASPECT_RATIO_NARROW } from '../../base/responsive-ui';
             const now = Date.now();
 
             for (const event of _eventList) {
-                if (event.url !== _currentConferenceURL) {
+                const eventUrl = getURLWithoutParamsNormalized(
+                    new URL(event.url)
+                );
+
+                if (eventUrl !== _currentConferenceURL) {
                     if ((!eventToShow
                         && event.startDate > now
                         && event.startDate < now + ALERT_MILLISECONDS)
     return {
         _aspectRatio: state['features/base/responsive-ui'].aspectRatio,
         _currentConferenceURL:
-            locationURL ? getURLWithoutParams(locationURL)._url : '',
+            locationURL
+                ? getURLWithoutParamsNormalized(locationURL) : '',
         _eventList: state['features/calendar-sync'].events
     };
 }