Bug 1885583 - [Menu Redesign]Add BottomSheetDialog.dismiss() when onRequestDismiss is called. r=android-reviewers,gl

Differential Revision: https://phabricator.services.mozilla.com/D217812

mobile/android/fenix/app/src/main/java/org/mozilla/fenix/components/menu/MenuDialogFragment.kt

@@ -107,7 +107,7 @@ class MenuDialogFragment : BottomSheetDialogFragment() {
 
         setContent {
             FirefoxTheme {
-                MenuDialogBottomSheet(onRequestDismiss = {}) {
+                MenuDialogBottomSheet(onRequestDismiss = { dismiss() }) {
                     val appStore = components.appStore
                     val browserStore = components.core.store
                     val syncStore = components.backgroundServices.syncStore