Check for native load in NotificationPermissionUpdater

When NotificationPermissionUpdater#onClientAppUninstalled is called,
native might not have been loaded, so we need a
ChromeFeatureList.isInitialized() check.

Change-Id: Idc478bfc880264b15f0ad5303f87aba0756ded04
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1782853
Auto-Submit: Pavel Shmakov <pshmakov@chromium.org>
Reviewed-by: Peter Conn <peconn@chromium.org>
Commit-Queue: Peter Conn <peconn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#693164}

chrome/android/java/src/org/chromium/chrome/browser/browserservices/permissiondelegation/NotificationPermissionUpdater.java

@@ -89,7 +89,7 @@ public class NotificationPermissionUpdater {
      * app was installed.
      */
     public void onClientAppUninstalled(Origin origin) {
-        if (!ChromeFeatureList.isEnabled(
+        if (ChromeFeatureList.isInitialized() && !ChromeFeatureList.isEnabled(
                 ChromeFeatureList.TRUSTED_WEB_ACTIVITY_NOTIFICATION_DELEGATION_ENROLMENT)) {
             return;
         }